[klibc] mount: allow multiple fs on vfstype arg

Basically it fixes the argument parsing when running something like
"mount -t ext3,ext2...".

I've already submitted the attached patch to the Debian BTS:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=480994

It is not yet the real fix for "-t auto", that could be faked by
replacing auto with a long list of fs types or running "fstype".

Signed-off-by: maximilian attems <max@stro.at>
diff --git a/usr/utils/mount_main.c b/usr/utils/mount_main.c
index cf5db69..b5993cc 100644
--- a/usr/utils/mount_main.c
+++ b/usr/utils/mount_main.c
@@ -42,8 +42,10 @@
 				rwflag |= MS_RDONLY;
 				goto retry;
 			}
-			break;
+		} else {
+			error = 0;
 		}
+		break;
 	}
 
 	if (error) {