Fix bug in writefat function

The readfat call returns 1 in case of success and 0 in case of failure.
writefat now correctly checks the return value of the call.

Change-Id: I95d09ec347ac5f2f751bb40a046f2567a1694422

1 files changed, 1 insertions, 1 deletions

diff --git a/fat.c b/fat.c
index b5a3302..7d07749 100644
--- a/fat.c
+++ b/fat.c
@@ -841,7 +841,7 @@ writefat(int fs, struct bootblock *boot, int correct_fat)
 			break;
 		}
 
-		if (_readfat(fs, boot, boot->ValidFat >= 0 ? boot->ValidFat :0,
+		if (!_readfat(fs, boot, boot->ValidFat >= 0 ? boot->ValidFat :0,
 					 &old_fat)) {
 			free(buffer);
 			return FSFATAL;