Disable test code from nvdecompress. Update vc12 projects and fix vc12 build. Fixes bug #232.

project/vc12/nvcore/nvcore.vcxproj

@@ -157,6 +157,7 @@
     <ClInclude Include="..\..\..\src\nvcore\Debug.h" />
     <ClInclude Include="..\..\..\src\nvcore\DefsVcWin32.h" />
     <ClInclude Include="..\..\..\src\nvcore\FileSystem.h" />
+    <ClInclude Include="..\..\..\src\nvcore\ForEach.h" />
     <ClInclude Include="..\..\..\src\nvcore\Memory.h" />
     <ClInclude Include="..\..\..\src\nvcore\nvcore.h" />
     <ClInclude Include="..\..\..\src\nvcore\Ptr.h" />

src/nvcore/ForEach.h

@@ -10,21 +10,27 @@ These foreach macros are very non-standard and somewhat confusing, but I like th
 
 #include "nvcore.h"
 
-#if NV_CC_GNUC || NV_CC_CPP11 // If typeof or decltype is available:
+#if NV_CC_GNUC // If typeof or decltype is available:
 #if !NV_CC_CPP11
 #   define NV_DECLTYPE typeof // Using a non-standard extension over typeof that behaves as C++11 decltype
 #else
 #   define NV_DECLTYPE decltype
 #endif
 
-#define NV_FOREACH(i, container) \
-    typedef NV_DECLTYPE(container) NV_STRING_JOIN2(cont,__LINE__); \
-    for(NV_STRING_JOIN2(cont,__LINE__)::PseudoIndex i((container).start()); !(container).isDone(i); (container).advance(i))
 /*
+Ideally we would like to write this:
+
 #define NV_FOREACH(i, container) \
-for(typename typeof(container)::PseudoIndex i((container).start()); !(container).isDone(i); (container).advance(i))
+    for(NV_DECLTYPE(container)::PseudoIndex i((container).start()); !(container).isDone(i); (container).advance(i))
+
+But gcc versions prior to 4.7 required an intermediate type. See:
+https://gcc.gnu.org/bugzilla/show_bug.cgi?id=6709
 */
 
+#define NV_FOREACH(i, container) \
+    typedef NV_DECLTYPE(container) NV_STRING_JOIN2(cont,__LINE__); \
+    for(NV_STRING_JOIN2(cont,__LINE__)::PseudoIndex i((container).start()); !(container).isDone(i); (container).advance(i))
+
 #else // If typeof not available:
 
 #include <new> // placement new

src/nvtt/tools/decompress.cpp

@@ -45,7 +45,7 @@ int main(int argc, char *argv[])
 	bool faces = false;
 	bool savePNG = false;
     bool rgbm = false;
-    bool histogram = true;
+    bool histogram = false;
 
 	nv::Path input;
 	nv::Path output;