fix compile warnings

Author: runette

source/pdal/pdalc_pipeline.cpp

@@ -98,7 +98,8 @@ extern "C"
     {
         if (pipeline)
         {
-            delete pipeline;
+            Pipeline *ptr = reinterpret_cast<Pipeline *>(pipeline);
+            delete ptr;
         }
     }
 

tests/pdal/test_pdalc_config.c

@@ -140,7 +140,7 @@ TEST testPDALVersionInfo(void)
         sha1[6] = '\0';
     }
 
-    sprintf(expected + strlen(version), " (git-version: %s)", sha1);
+    snprintf(expected + strlen(version), " (git-version: %s)", sha1);
 
     char fullVersion[64];
     size = PDALFullVersionString(fullVersion, 64);