VS11: Detect VS 2012 Express for default generator (#13348)

Add WDExpress to the list of registry search locations.  Add VS 11 to
the list of VS versions and corresponding generator names.  Fix the
search logic to use the most recent version found under any registry
entry.

Inspired-by: Peter Kümmel <[email protected]>

Source/cmake.cxx

@@ -2184,6 +2184,7 @@ int cmake::ActualConfigure()
       std::vector<std::string> vsVerions;
       vsVerions.push_back("VisualStudio\\");
       vsVerions.push_back("VCExpress\\");
+      vsVerions.push_back("WDExpress\\");
       struct VSRegistryEntryName
       {
         const char* MSVersion;
@@ -2196,10 +2197,11 @@ int cmake::ActualConfigure()
         {"8.0", "Visual Studio 8 2005"},
         {"9.0", "Visual Studio 9 2008"},
         {"10.0", "Visual Studio 10"},
+        {"11.0", "Visual Studio 11"},
         {0, 0}};
-      for(size_t b=0; b < vsVerions.size() && installedCompiler.empty(); b++)
+      for(int i=0; version[i].MSVersion != 0; i++)
         {
-        for(int i =0; version[i].MSVersion != 0; i++)
+        for(size_t b=0; b < vsVerions.size(); b++)
           {
           std::string reg = vsregBase + vsVerions[b] + version[i].MSVersion;
           reg += ";InstallDir]";
@@ -2208,6 +2210,7 @@ int cmake::ActualConfigure()
           if (!(reg == "/registry"))
             {
             installedCompiler = version[i].GeneratorName;
+            break;
             }
           }
         }