git: 430168942f2b - main - newfs: prefer unsigned index over signed

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=430168942f2bf68b0230906a658a0ceb7acceef2

commit 430168942f2bf68b0230906a658a0ceb7acceef2
Author:     Alfonso Gregory <gfunni234@gmail.com>
AuthorDate: 2023-06-28 22:14:07 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2023-06-28 22:18:47 +0000

    newfs: prefer unsigned index over signed
    
    We can just use a for loop starting at 0 instead of a while loop
    starting at -1.
    
    Reviewed by: imp, mckusick
    Pull Request: https://github.com/freebsd/freebsd-src/pull/733
---
 sbin/newfs/newfs.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/sbin/newfs/newfs.c b/sbin/newfs/newfs.c
index a2d97131d3a7..2dbd27ce2a0f 100644
--- a/sbin/newfs/newfs.c
+++ b/sbin/newfs/newfs.c
@@ -137,7 +137,8 @@ main(int argc, char *argv[])
 	struct stat st;
 	char *cp, *special;
 	intmax_t reserved;
-	int ch, i, rval;
+	int ch, rval;
+	size_t i;
 	char part_name;		/* partition name, default to full disk */
 
 	part_name = 'c';
@@ -153,9 +154,10 @@ main(int argc, char *argv[])
 			break;
 		case 'L':
 			volumelabel = optarg;
-			i = -1;
-			while (isalnum(volumelabel[++i]) ||
-			    volumelabel[i] == '_' || volumelabel[i] == '-');
+			for (i = 0; isalnum(volumelabel[i]) ||
+			    volumelabel[i] == '_' || volumelabel[i] == '-';
+			    i++)
+				continue;
 			if (volumelabel[i] != '\0') {
 				errx(1, "bad volume label. Valid characters "
 				    "are alphanumerics, dashes, and underscores.");