Add default values for c and e to prevent values not set crashing nbs

Author: OctoFlareDev

scripts/control_draw/control_draw.gml

@@ -449,7 +449,9 @@ function control_draw() {
 		        for (b = colfirst[xx]; b <= collast[xx]; b += 1) {
 		            if (song_exists[xx, b]) {
 		                a = 1
+						c = 1
 						d = 0
+						e = 0
 		                if (b < endb2) {
 							c = (layervol[b] /100) * song_vel[xx, b]
 							if layerstereo[b] = 100 {