libbb: introduce and use xrealloc_vector

function                                             old     new   delta
xrealloc_vector_helper                                 -      51     +51
create_list                                           84      99     +15
getopt_main                                          690     695      +5
passwd_main                                         1049    1053      +4
get_cached                                            85      89      +4
msh_main                                            1377    1380      +3
add_match                                             42      41      -1
read_lines                                           720     718      -2
grave                                               1068    1066      -2
fill_match_lines                                     143     141      -2
add_to_dirlist                                        67      65      -2
add_input_file                                        49      47      -2
act                                                  252     250      -2
fsck_main                                           2252    2246      -6
man_main                                             765     757      -8
bb_internal_initgroups                               228     220      -8
cut_main                                            1052    1041     -11
add_edge_to_node                                      55      43     -12
dpkg_main                                           3851    3835     -16
ifupdown_main                                       2202    2178     -24
sort_main                                            838     812     -26
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 5/15 up/down: 82/-124)          Total: -42 bytes

1 files changed, 3 insertions, 3 deletions

diff --git a/e2fsprogs/fsck.c b/e2fsprogs/fsck.c
index c17693699..86c78d881 100644
--- a/e2fsprogs/fsck.c
+++ b/e2fsprogs/fsck.c
@@ -1028,13 +1028,13 @@ static void parse_args(char **argv)
 // FIXME: must check that arg is a blkdev, or resolve
 // "/path", "UUID=xxx" or "LABEL=xxx" into block device name
 // ("UUID=xxx"/"LABEL=xxx" can probably shifted to fsck.auto duties)
-			devices = xrealloc(devices, (num_devices+1) * sizeof(devices[0]));
+			devices = xrealloc_vector(devices, 2, num_devices);
 			devices[num_devices++] = xstrdup(arg);
 			continue;
 		}
 
 		if (arg[0] != '-' || opts_for_fsck) {
-			args = xrealloc(args, (num_args+1) * sizeof(args[0]));
+			args = xrealloc_vector(args, 2, num_args);
 			args[num_args++] = xstrdup(arg);
 			continue;
 		}
@@ -1111,7 +1111,7 @@ static void parse_args(char **argv)
 		if (optpos) {
 			options[0] = '-';
 			options[optpos + 1] = '\0';
-			args = xrealloc(args, (num_args+1) * sizeof(args[0]));
+			args = xrealloc_vector(args, 2, num_args);
 			args[num_args++] = options;
 		}
 	}