Merge branch 'ripple-sprite-scale-fixes' into 'next'

Fix sprite scale column iteration crash

See merge request STJr/SRB2!2130

src/r_things.c

@@ -844,6 +844,15 @@ static void R_DrawVisSprite(vissprite_t *vis)
 		if ((UINT64)overflow_test&0xFFFFFFFF80000000ULL) return; // ditto
 	}
 
+	// TODO This check should not be necessary. But Papersprites near to the camera will sometimes create invalid values
+	// for the vissprite's startfrac. This happens because they are not depth culled like other sprites.
+	// Someone who is more familiar with papersprites pls check and try to fix <3
+	if (vis->startfrac < 0 || vis->startfrac > (patch->width << FRACBITS))
+	{
+		// never draw vissprites with startfrac out of patch range
+		return;
+	}
+
 	colfunc = colfuncs[BASEDRAWFUNC]; // hack: this isn't resetting properly somewhere.
 	dc_colormap = vis->colormap;
 	dc_translation = R_GetSpriteTranslation(vis);