Don't call glGetFloat every time love.graphics.getSystemLimits is called.

src/modules/graphics/opengl/Graphics.cpp

@@ -1661,13 +1661,10 @@ Graphics::Stats Graphics::getStats() const
 
 double Graphics::getSystemLimit(SystemLimit limittype) const
 {
-	GLfloat limits[2];
-
 	switch (limittype)
 	{
 	case Graphics::LIMIT_POINT_SIZE:
-		glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, limits);
-		return (double) limits[1];
+		return (double) gl.getMaxPointSize();
 	case Graphics::LIMIT_TEXTURE_SIZE:
 		return (double) gl.getMaxTextureSize();
 	case Graphics::LIMIT_MULTI_CANVAS:

src/modules/graphics/opengl/OpenGL.cpp

@@ -289,6 +289,10 @@ void OpenGL::initMaxValues()
 		maxRenderbufferSamples = 0;
 
 	glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
+
+	GLfloat limits[2];
+	glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, limits);
+	maxPointSize = limits[1];
 }
 
 void OpenGL::initMatrices()

src/modules/graphics/opengl/OpenGL.h

@@ -377,6 +377,12 @@ public:
 	 **/
 	int getMaxTextureUnits() const;
 
+	/**
+	 * Returns the maximum point size.
+	 **/
+	float getMaxPointSize() const;
+
+
 	void updateTextureMemorySize(size_t oldsize, size_t newsize);
 
 	/**
@@ -408,6 +414,7 @@ private:
 	int maxRenderTargets;
 	int maxRenderbufferSamples;
 	int maxTextureUnits;
+	float maxPointSize;
 
 	Vendor vendor;