Don't crach when OpenGL version is unsupported
Don't crach when OpenGL version is unsupported

(cherry picked from commit ca3b8deb7860eb54c2b5ef44eb686799a688febc)

pixelpicosean/my-godot-2.1,pixelpicosean/my-godot-2.1,pixelpicosean/my-godot-2.1,pixelpicosean/my-godot-2.1,pixelpicosean/my-godot-2.1