Cleanup: getting rid of G.main.

Sometimes one needs a *lot* of changes for a single G.main... :/

source/blender/python/intern/gpu_offscreen.c

@@ -35,6 +35,8 @@
 
 #include "WM_types.h"
 
+#include "BKE_global.h"
+
 #include "ED_screen.h"
 
 #include "GPU_compositing.h"
@@ -192,7 +194,7 @@ static PyObject *pygpu_offscreen_draw_view3d(BPy_GPUOffScreen *self, PyObject *a
 
 	fx_settings = v3d->fx_settings;  /* full copy */
 
-	ED_view3d_draw_offscreen_init(scene, v3d);
+	ED_view3d_draw_offscreen_init(G.main, scene, v3d);
 
 	rv3d_mats = ED_view3d_mats_rv3d_backup(ar->regiondata);