Fix uninitialized variables, and use -O so gcc starts checking for them

Gcc only sends warnings for uninitialized variables when you compile with -O,
and there were a couple of bugs sprinkled in the code.  The biggest was the
alloc_start variable for mkfs, which can cause strange things to happen.

(thanks to Gabor Micsko for helping to find this)

1 files changed, 3 insertions, 2 deletions

diff --git a/utils.c b/utils.c
index 2fa3c96c..44a5dc6d 100644
--- a/utils.c
+++ b/utils.c
@@ -645,7 +645,7 @@ int btrfs_register_one_device(char *fname)
 
 int btrfs_scan_one_dir(char *dirname, int run_ioctl)
 {
-	DIR *dirp;
+	DIR *dirp = NULL;
 	struct dirent *dirent;
 	struct pending_dir *pending;
 	struct stat st;
@@ -734,7 +734,8 @@ again:
 	ret = 0;
 fail:
 	free(pending);
-	closedir(dirp);
+	if (dirp)
+		closedir(dirp);
 	return ret;
 }