fstype: Fix reversed test for "-" on command line

The test for a "-" argument on the command line is reversed, so that
fstype will only attempt to open a file name provided on the command
line if it is "-", rather than only if it is not "-". This patch fixes
that.

Signed-off-by: Colin Watson <cjwatson@ubuntu.com>
diff --git a/usr/kinit/fstype/main.c b/usr/kinit/fstype/main.c
index 7c81f24..0ceb593 100644
--- a/usr/kinit/fstype/main.c
+++ b/usr/kinit/fstype/main.c
@@ -37,7 +37,7 @@
 		return 1;
 	}
 
-	if (argc > 1 && argv[1][0] == '-' && argv[1][1] == '\0') {
+	if (argc > 1 && !(argv[1][0] == '-' && argv[1][1] == '\0')) {
 		fd = open(file = argv[1], O_RDONLY);
 		if (fd < 0) {
 			perror(argv[1]);