removed /O2 from debug

Templates/CMakeWindowsSystemConfig.cmake

@@ -8,5 +8,5 @@ SET (HAVE_UNISTD_H   1)
 SET (CXX  VC++60)
 SET (CMAKE_CXX_FLAGS_RELEASE "/MD /O2" CACHE_NO_REPLACE)
 SET (CMAKE_CXX_FLAGS_MINSIZEREL "/MD /O1" CACHE_NO_REPLACE)
-SET (CMAKE_CXX_FLAGS_DEBUG "/MDd /Zi /Od /Gz /O2" CACHE_NO_REPLACE)
+SET (CMAKE_CXX_FLAGS_DEBUG "/MDd /Zi /Od /Gz" CACHE_NO_REPLACE)
 SET (CMAKE_CXX_FLAGS "/W3 /Zm1000 /GX /GR" CACHE_NO_REPLACE)