Update VS props to suppress missing openssl PDB warnings.

Author: evoskuil

builds/msvc/vs2013/bitcoin-server/bitcoin-server.props

@@ -16,9 +16,10 @@
       <EnablePREfast>false</EnablePREfast>
       <PreprocessorDefinitions>_WIN32_WINNT=0x0600;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
-    <Link Condition="$(Configuration.IndexOf('Debug')) != -1">
+    <!-- Suppress warnings from missing OpenSSL PDBs. -->
+    <Link Condition="'$(DebugOrRelease)' == 'debug'">
       <AdditionalOptions>/OPT:NOLBR /IGNORE:4099 %(AdditionalOptions)</AdditionalOptions>
-    </Link>    
+    </Link>
   </ItemDefinitionGroup>
 
   <!-- Dependencies -->