add-patch: quit without skipping undecided hunks

Option q implies d, i.e., it marks any undecided hunks towards the
bottom of the hunk array as skipped.  This is unnecessary; later code
treats undecided and skipped hunks the same: The only functions that
use UNDECIDED_HUNK and SKIP_HUNK are patch_update_file() itself (but
not after its big for loop) and its helpers get_first_undecided() and
display_hunks().

Streamline the handling of option q by quitting immediately.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: rscharfe

add-patch.c

@@ -1601,7 +1601,7 @@ static int patch_update_file(struct add_p_state *s,
 			} else if (hunk->use == UNDECIDED_HUNK) {
 				hunk->use = USE_HUNK;
 			}
-		} else if (ch == 'd' || ch == 'q') {
+		} else if (ch == 'd') {
 			if (file_diff->hunk_nr) {
 				for (; hunk_index < file_diff->hunk_nr; hunk_index++) {
 					hunk = file_diff->hunk + hunk_index;
@@ -1613,10 +1613,9 @@ static int patch_update_file(struct add_p_state *s,
 			} else if (hunk->use == UNDECIDED_HUNK) {
 				hunk->use = SKIP_HUNK;
 			}
-			if (ch == 'q') {
-				quit = 1;
-				break;
-			}
+		} else if (ch == 'q') {
+			quit = 1;
+			break;
 		} else if (s->answer.buf[0] == 'K') {
 			if (permitted & ALLOW_GOTO_PREVIOUS_HUNK)
 				hunk_index = dec_mod(hunk_index,