Assume default struct initialization for OptionDef arrays.

The use of -Wmissing-field-initializers causes a warning for
aggregate-initialization in the form of { NULL } where the struct has
more than a single field with the first field a pointer.  This replaces
{ NULL } with a value of { } to signify the end of the list.

Author: samhansen

src/lib/support/nlargparser.cpp

@@ -1082,7 +1082,7 @@ HelpOptions::HelpOptions(const char *appName, const char *appUsage, const char *
     {
         { "help",      kNoArgument, 'h' },
         { "version",   kNoArgument, 'v' },
-        { NULL }
+        { }
     };
     OptionDefs = optionDefs;
 

src/test-apps/CASEOptions.cpp

@@ -152,7 +152,7 @@ CASEOptions::CASEOptions()
         { "case-use-known-key",     kNoArgument,            kToolCommonOpt_CASEUseKnownECDHKey  },
 #endif // WEAVE_CONFIG_SECURITY_TEST_MODE
 #endif // WEAVE_CONFIG_ENABLE_CASE_INITIATOR || WEAVE_CONFIG_ENABLE_CASE_RESPONDER
-        { NULL }
+        { }
     };
     OptionDefs = optionDefs;
 

src/test-apps/DeviceDescOptions.cpp

@@ -44,7 +44,7 @@ DeviceDescOptions::DeviceDescOptions()
         { "product-id",       kArgumentRequired, kToolCommonOpt_DeviceProductId        },
         { "product-rev",      kArgumentRequired, kToolCommonOpt_DeviceProductRevision  },
         { "software-version", kArgumentRequired, kToolCommonOpt_DeviceSoftwareVersion  },
-        { NULL }
+        { }
     };
     OptionDefs = optionDefs;
 

src/test-apps/GenerateEventLog.cpp

@@ -350,7 +350,7 @@ static OptionDef gToolOptionDefs[] = { { "loglevel", kArgumentRequired, 'l' },
                                        { "test", kArgumentRequired, 't' },
                                        { "verbose", kNoArgument, 'V' },
                                        { "wdm", kNoArgument, 'w' },
-                                       { NULL } };
+                                       { } };
 
 static const char * gToolOptionHelp = "  -l, --loglevel <logLevel>\n"
                                       "       Configured default log level, 1 - PRODUCTION, 2 - INFO, 3 - DEBUG\n"

src/test-apps/KeyExportOptions.cpp

@@ -140,7 +140,7 @@ KeyExportOptions::KeyExportOptions()
         { "allowed-key-export-configs", kArgumentRequired,      kToolCommonOpt_AllowedKeyExportConfigs },
         { "access-token",               kArgumentRequired,      kToolCommonOpt_AccessToken             },
 #endif
-        { NULL }
+        { }
     };
     OptionDefs = optionDefs;
 

src/test-apps/MockWdmNodeOptions.cpp

@@ -93,7 +93,7 @@ MockWdmNodeOptions::MockWdmNodeOptions() :
         { "wdm-update-timing",                              kArgumentRequired,  kToolOpt_WdmUpdateTiming },
         { "wdm-update-discard-on-error",                    kNoArgument,        kToolOpt_WdmUpdateDiscardOnError },
 #endif // WEAVE_CONFIG_ENABLE_RELIABLE_MESSAGING
-        { NULL }
+        { }
     };
 
     OptionDefs = optionDefs;
@@ -593,7 +593,7 @@ TestWdmNextOptions::TestWdmNextOptions(void) :
         { "test-delay",                                     kArgumentRequired,  kToolOpt_TestDelayBetweenIterationMsec },
         { "save-perf",                                      kNoArgument,        kToolOpt_SavePerfData },
         { "clear-state-between-iterations",                 kNoArgument,        kToolOpt_ClearDataSinkStateBetweenTests },
-        { NULL }
+        { }
     };
 
     OptionDefs = optionDefs;

src/test-apps/TAKEOptions.cpp

@@ -39,7 +39,7 @@ TAKEOptions::TAKEOptions()
 #if WEAVE_CONFIG_ENABLE_TAKE_INITIATOR || WEAVE_CONFIG_ENABLE_TAKE_RESPONDER
         { "take-reauth", kNoArgument, kToolCommonOpt_TAKEReauth           },
 #endif
-        { NULL }
+        { }
     };
     OptionDefs = optionDefs;
 

src/test-apps/TestArgParser.cpp

@@ -121,7 +121,7 @@ static OptionDef sOptionSetA_Defs[] =
     { "foo",  kNoArgument, '1'  },
     { "bar",  kNoArgument, 1001 },
     { "baz",  kArgumentRequired, 'Z'  },
-    { NULL }
+    { }
 };
 
 static OptionSet sOptionSetA =
@@ -140,7 +140,7 @@ static OptionDef sOptionSetB_Defs[] =
     { "stop", kNoArgument, 's'  },
     { "run",  kArgumentRequired, 1000  },
     { "walk", kNoArgument, 1001 },
-    { NULL }
+    { }
 };
 
 static OptionSet sOptionSetB =

src/test-apps/TestBinding.cpp

@@ -147,7 +147,7 @@ static OptionDef gToolOptionDefs[] =
 #if WEAVE_CONFIG_ENABLE_DNS_RESOLVER
     { "dns-options",            kArgumentRequired, kToolOpt_DNSOptions          },
 #endif // WEAVE_CONFIG_ENABLE_DNS_RESOLVER
-    { NULL }
+    { }
 };
 
 static const char *const gToolOptionHelp =

src/test-apps/TestCASE.cpp

@@ -1031,7 +1031,7 @@ void CASEEngineTests_FuzzTests()
 static OptionDef gToolOptionDefs[] =
 {
     { "fuzz-duration", kArgumentRequired, 'f' },
-    { NULL }
+    { }
 };
 
 static const char *const gToolOptionHelp =