use PRE_RELEASE=PRE_RELEASE environment variable

Author: fiendish

MUSHclient.cpp

@@ -235,7 +235,7 @@ BOOL CMUSHclientApp::InitInstance()
 
   MUSHCLIENT_VERSION = VERSION_STRING;
 
-#if _MSC_VER == 1900     // 1200 for Visual Studio 6, 1900 for MSVC 2015
+#ifdef PRE_RELEASE
   MUSHCLIENT_VERSION += "-pre";
 #endif
 

MUSHclient.vcxproj

@@ -122,7 +122,7 @@
       <Optimization>MaxSpeed</Optimization>
       <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
       <AdditionalIncludeDirectories>$(SolutionDir);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>NDEBUG;WIN32;_WINDOWS;ZLIB_DLL;LUA51;_CRT_SECURE_NO_WARNINGS;_CRT_NON_CONFORMING_SWPRINTFS;NO_WARN_MBCS_MFC_DEPRECATION;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;WIN32;_WINDOWS;ZLIB_DLL;LUA51;_CRT_SECURE_NO_WARNINGS;_CRT_NON_CONFORMING_SWPRINTFS;NO_WARN_MBCS_MFC_DEPRECATION;$(PRE_RELEASE);%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <FunctionLevelLinking>true</FunctionLevelLinking>
@@ -1446,4 +1446,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

appveyor.yml

@@ -4,16 +4,17 @@ branches:
   - master
 skip_tags: true
 configuration: Release
+environment:
+  auth_token:
+    secure: SKQr480MzNJLzmyrFxDeMta2nHica+9ed2n1Djpa53ioURK0NLo/iStu9DhUrQIK
+  PRE_RELEASE: PRE_RELEASE
 build:
   project: MUSHclient_2015.sln
   parallel: true
   verbosity: normal
 artifacts:
 - path: WinRel\MUSHclient.exe
   name: release_exe
-environment:
-  auth_token:
-    secure: SKQr480MzNJLzmyrFxDeMta2nHica+9ed2n1Djpa53ioURK0NLo/iStu9DhUrQIK
 before_deploy:
 - git config --global credential.helper store
 - ps: Add-Content "$env:USERPROFILE\.git-credentials" "https://$($env:auth_token):x-oauth-basic@github.com`n"