modifiers: Fix PVS 743

Fix  'gotone' is assigned values twice successively.

Change-Id: Ibe9f531ba4d16cec61b49cc49e842486b5ab6f64
Reviewed-on: https://review.haiku-os.org/700
Reviewed-by: Adrien Destugues <[email protected]>

src/bin/modifiers.cpp

@@ -58,7 +58,6 @@ list_modifiers(int mods)
 		if (mods & modifier_bits[i]) {
 			if (gotone)
 				printf(",");
-			gotone = 0;
 			printf("%s", modifier_names[i]);
 			gotone = 1;
 		}