Fixed perspective with zNear == 0 (#71)

test/gtc/gtc_matrix_transform.cpp

@@ -14,6 +14,7 @@ int main()
 {
 	int Error = 0;
 	
+	glm::mat4 Projection = glm::perspective(45.0f, 4.0f / 3.0f, 0.1f, 100.0f);
 	glm::mat4 Pick = glm::pickMatrix(glm::vec2(1, 2), glm::vec2(3, 4), glm::ivec4(0, 0, 320, 240));
 
 	return Error;