Ver. 1.3.5: 'Single'-Framing fix

This is a highly recommended bugfix update.

Fixes:

• ‘Single’-framing now works correctly on actor sprites.

Previously, the wrong sprite was checked for a bitmap and had its frame updated. (Sprite_Actor is composite and it’s its ._mainSprite that shows the battler image.)

To be honest, I’m still puzzled why this appeared to work correctly in my test project. Maybe because I was testing with the default actor spritesheets instead of single frame images, but that doesn’t quite explain everything.