~ 5% speedup for font-rendering overall

This is probably the last speedup for this.

src/TextRendering.cpp

@@ -34,10 +34,9 @@ namespace JGL {
         if (font.face == nullptr)
             return;
 
-        FT_Set_Pixel_Sizes(font.face, 0, size);
-
         //If the font doesn't exist in the cache yet.
         if (!cachedFont) {
+            FT_Set_Pixel_Sizes(font.face, 0, size);
             jlog::Debug("Caching font data...");
             GLuint texture_id;
             glGenTextures(1, &texture_id);