Wrap tvec4's static constants in GLM_STATIC_CONST_MEMBERS

- Fix the indentation, too

glm/detail/type_vec4.hpp

@@ -112,6 +112,7 @@ namespace detail
 			static GLM_RELAXED_CONSTEXPR precision prec = P;
 #		endif//GLM_META_PROG_HELPERS
 
+#		ifdef GLM_STATIC_CONST_MEMBERS
 		static const type ZERO;
 		static const type X;
 		static const type Y;
@@ -128,6 +129,8 @@ namespace detail
 		static const type XZW;
 		static const type YZW;
 		static const type XYZW;
+#		endif
+
 		// -- Data --
 
 #		if GLM_HAS_ANONYMOUS_UNION && GLM_NOT_BUGGY_VC32BITS

glm/detail/type_vec4.inl

@@ -32,6 +32,8 @@
 
 namespace glm
 {
+
+#	ifdef GLM_STATIC_CONST_MEMBERS
 	template <typename T, precision P>
 	const tvec4<T, P> tvec4<T, P>::ZERO =
 			tvec4<T, P>(static_cast<T>(0), static_cast<T>(0), static_cast<T>(0), static_cast<T>(0));
@@ -95,7 +97,7 @@ const tvec4<T, P> tvec4<T, P>::YZW =
 	template <typename T, precision P>
 	const tvec4<T, P> tvec4<T, P>::XYZW =
 			tvec4<T, P>(static_cast<T>(1), static_cast<T>(1), static_cast<T>(1), static_cast<T>(1));
-
+#	endif
 	// -- Implicit basic constructors --
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS || !defined(GLM_FORCE_NO_CTOR_INIT)

test/core/core_type_vec4.cpp

@@ -33,6 +33,7 @@
 #	define GLM_META_PROG_HELPERS
 #endif
 #define GLM_SWIZZLE
+#define GLM_STATIC_CONST_MEMBERS
 #include <glm/vector_relational.hpp>
 #include <glm/vec2.hpp>
 #include <glm/vec3.hpp>