build: try to bypass a SNC VSI issue with string replacements.

build/vs2010/Lol.Core.Rules.props

@@ -17,8 +17,12 @@
       <AdditionalIncludeDirectories Condition="'$(Platform)'=='Win32'">$(GlIncludes);$(SdlIncludes);$(D3d9Includes);$(XinputIncludes);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <AdditionalIncludeDirectories Condition="'$(Platform)'=='x64'">$(GlIncludes);$(SdlIncludes);$(D3d9Includes);$(XinputIncludes);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>NOMINMAX;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <PreprocessorDefinitions>LOL_CONFIG_PROJECTDIR="$(ProjectDir.Replace('\',"\\"))";%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <PreprocessorDefinitions>LOL_CONFIG_SOLUTIONDIR="$(SolutionDir.Replace('\',"\\"))";%(PreprocessorDefinitions)</PreprocessorDefinitions>
+
+      <!-- The "\\" replacement is a hack for the SNC VSI; the proper way to
+           do that is using $([System.Text.RegularExpressions.Regex]...) -->
+      <PreprocessorDefinitions>LOL_CONFIG_PROJECTDIR="$(ProjectDir.Replace(@"\\",@"\").Replace(@"\",@"\\"))";%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>LOL_CONFIG_SOLUTIONDIR="$(SolutionDir.Replace(@"\\",@"\").Replace(@"\",@"\\"))";%(PreprocessorDefinitions)</PreprocessorDefinitions>
+
       <PreprocessorDefinitions Condition="'$(Platform)'=='Win32'">WIN32;$(Win32Defines);%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(Platform)'=='x64'">WIN32;$(Win32Defines);%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(Platform)'=='Xbox 360'">_XBOX;$(XboxDefines);%(PreprocessorDefinitions)</PreprocessorDefinitions>