vs: Move defines out of Common.h to the build system

Source/Core/Common/Common.h

@@ -39,13 +39,6 @@ extern const std::string scm_distributor_str;
 
 // Since they are always around on Windows
 #define HAVE_WX 1
-#ifndef HAVE_OPENAL
-#define HAVE_OPENAL 1
-#endif
-
-#ifndef HAVE_PORTAUDIO
-#define HAVE_PORTAUDIO 1
-#endif
 
 // Debug definitions
 #if defined(_DEBUG)

Source/VSProps/Base.props

@@ -55,6 +55,8 @@
       <PreprocessorDefinitions>PSAPI_VERSION=1;_M_X86=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions>SFML_STATIC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions>CURL_STATICLIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>HAVE_OPENAL=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>HAVE_PORTAUDIO=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(Platform)'=='x64'">_ARCH_64=1;_M_X86_64=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <!--
       Make sure we include a clean version of windows.h.