Revert "Revert "Specializing numeric_limits for float16 in any case""

This reverts commit a3d365b977.

openVulkanoCpp/Math/Float16.hpp

@@ -236,7 +236,14 @@ namespace std
 			return hash<uint16_t>()(key.m_data);
 		}
 	};
+}
 
+#endif
+#undef __has_keyword
+
+
+namespace std
+{
 	template <>
 	class numeric_limits<float16>
 	{
@@ -279,9 +286,5 @@ namespace std
 	};
 }
 
-#endif
-#undef __has_keyword
-
-
 typedef float16 fp16;
 typedef float16 half;