Move some of the sprite math out of the actor into the sprite

src/actor.c

@@ -235,16 +235,18 @@ akerr_ErrorContext *akgl_actor_render(akgl_Actor *obj, SDL_Renderer *renderer)
 	// get cleaned up on the next logic update. Just pass on rendering them this frame.
 	SUCCEED_RETURN(errctx);
     }
+
+    ATTEMPT {
+	CATCH(errctx,
+	      akgl_sprite_sheet_coords_for_frame(
+		  curSprite,
+		  &src,
+		  obj->curSpriteFrameId)
+	    );
+    } CLEANUP {
+    } PROCESS(errctx) {
+    } FINISH(errctx, true);
     
-    src.x = curSprite->width * curSprite->frameids[obj->curSpriteFrameId];
-    if ( src.x >= curSprite->sheet->texture->w ) {
-	src.y = ((int)src.x / curSprite->sheet->texture->w) * curSprite->height;
-	src.x = ((int)src.x % curSprite->sheet->texture->w);
-    } else {
-	src.y = 0;
-    }
-    src.w = curSprite->width;
-    src.h = curSprite->height;
     if ( obj->parent != NULL ) {
 	dest.x = (obj->parent->x + obj->x - camera.x);
 	dest.y = (obj->parent->y + obj->y - camera.y);