proc: use "unsigned int" for sigqueue length

It's defined as atomic_t and really long signal queues are unheard of.

Link: http://lkml.kernel.org/r/20180423215119.GF9043@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/proc/array.c

@@ -268,7 +268,7 @@ static inline void task_sig(struct seq_file *m, struct task_struct *p)
 	unsigned long flags;
 	sigset_t pending, shpending, blocked, ignored, caught;
 	int num_threads = 0;
-	unsigned long qsize = 0;
+	unsigned int qsize = 0;
 	unsigned long qlim = 0;
 
 	sigemptyset(&pending);