Fix the following compiler warnings:
fs/fuse/cuse.c: In function 'cuse_process_init_reply':
fs/fuse/cuse.c:288:24: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized]
fs/fuse/cuse.c:272:14: note: 'val' was declared here
fs/fuse/cuse.c:284:10: warning: 'key' may be used uninitialized in this function [-Wmaybe-uninitialized]
fs/fuse/cuse.c:272:8: note: 'key' was declared here
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
 static int cuse_parse_devinfo(char *p, size_t len, struct cuse_devinfo *devinfo)
 {
        char *end = p + len;
-       char *key, *val;
+       char *uninitialized_var(key), *uninitialized_var(val);
        int rc;
 
        while (true) {