Fixed warnings with the Android NDK 9c (#156)

glm/detail/func_common.inl

@@ -88,7 +88,7 @@ namespace detail
 	{
 		GLM_STATIC_ASSERT(
 			std::numeric_limits<genFIType>::is_iec559 ||
-			std::numeric_limits<genFIType>::is_signed && std::numeric_limits<genFIType>::is_integer, "'sign' only accept signed inputs");
+			(std::numeric_limits<genFIType>::is_signed && std::numeric_limits<genFIType>::is_integer, "'sign' only accept signed inputs"));
 
 		genFIType result;
 		if(x > genFIType(0))

readme.txt

@@ -39,7 +39,7 @@ http://glm.g-truc.net/glm.pdf
 ================================================================================
 GLM 0.9.5.2: 2014-0X-XX
 --------------------------------------------------------------------------------
-
+- Fixed warnings with the Android NDK 9c
 
 ================================================================================
 GLM 0.9.5.1: 2014-01-11