Add static components and prec members to all vector and quaternion types

test/gtc/gtc_quaternion.cpp

@@ -8,14 +8,14 @@
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-/// 
+///
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+///
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@@ -324,6 +324,8 @@ int main()
 {
 	int Error(0);
 
+	assert(glm::quat::components == 4);
+
 	Error += test_quat_ctr();
 	Error += test_quat_mul_vec();
 	Error += test_quat_two_axis_ctr();