added UNICODE preprocessor define

vsprops/code_generation_debug.props

@@ -5,7 +5,7 @@
   <PropertyGroup />
   <ItemDefinitionGroup>
     <ClCompile>
-      <PreprocessorDefinitions>_DEBUG;_SECURE_SCL=1;_CRT_SECURE_NO_WARNINGS;_CRT_SECURE_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;_SECURE_SCL=1;_CRT_SECURE_NO_WARNINGS;_CRT_SECURE_NO_DEPRECATE;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <MinimalRebuild>false</MinimalRebuild>
     </ClCompile>

vsprops/code_generation_release.props

@@ -9,7 +9,7 @@
     <ClCompile>
       <MinimalRebuild>false</MinimalRebuild>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
-      <PreprocessorDefinitions>_SECURE_SCL=0;_CRT_SECURE_NO_WARNINGS;_CRT_SECURE_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_SECURE_SCL=0;_CRT_SECURE_NO_WARNINGS;_CRT_SECURE_NO_DEPRECATE;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <EnableEnhancedInstructionSet>StreamingSIMDExtensions2</EnableEnhancedInstructionSet>
     </ClCompile>