Added matrix integer extensions and tests

test/ext/ext_matrix_int2x4_sized.cpp

@@ -0,0 +1,28 @@
+#include <glm/ext/matrix_int2x4_sized.hpp>
+
+#if GLM_HAS_STATIC_ASSERT
+static_assert(sizeof(glm::i8mat2x4) == 8, "int8 size isn't 1 byte on this platform");
+static_assert(sizeof(glm::i16mat2x4) == 16, "int16 size isn't 2 bytes on this platform");
+static_assert(sizeof(glm::i32mat2x4) == 32, "int32 size isn't 4 bytes on this platform");
+static_assert(sizeof(glm::i64mat2x4) == 64, "int64 size isn't 8 bytes on this platform");
+#endif
+
+static int test_comp()
+{
+	int Error = 0;
+
+	Error += sizeof(glm::i8mat2x4) < sizeof(glm::i16mat2x4) ? 0 : 1;
+	Error += sizeof(glm::i16mat2x4) < sizeof(glm::i32mat2x4) ? 0 : 1;
+	Error += sizeof(glm::i32mat2x4) < sizeof(glm::i64mat2x4) ? 0 : 1;
+
+	return Error;
+}
+
+int main()
+{
+	int Error = 0;
+
+	Error += test_comp();
+
+	return Error;
+}