[Improvement] Raylib renderer segfaults if fonts fail to load

[LucasMW]

Can't run on Mac OS Sonoma INFO: FONT: Default font loaded successfully (224 glyphs) INFO: SYSTEM: Working Directory: /Users/lucassousa WARNING: FILEIO: [resources/profile-picture.png] Failed to open file WARNING: IMAGE: Data is not valid to load texture WARNING: FILEIO: [resources/Roboto-Regular.ttf] Failed to open file WARNING: FILEIO: [resources/Roboto-Regular.ttf] Failed to open file zsh: segmentation fault