Removed sign-compare check from MSVC builds.

CMakeLists.txt

@@ -8,7 +8,6 @@ include(address_sanitizer)
 add_definitions(
 	-std=c++11
 	-Wall
-	-Wsign-compare
 	-nostdlib
 	-fno-exceptions
 	-fno-rtti
@@ -17,6 +16,12 @@ add_definitions(
 	#-Os # GCC size optimization flag
 )
 
+if(NOT MSVC)
+	add_definitions(
+		-Wsign-compare
+	)
+endif(NOT MSVC)
+
 enable_testing()
 
 include_directories("src")