fsmonitor: fix incorrect buffer size when printing version number

This is a trivial bug fix for passing the incorrect size to snprintf() when
outputting the version.  It should be passing the size of the destination buffer
rather than the size of the value being printed.

Signed-off-by: Ben Peart <benpeart@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

fsmonitor.c

@@ -114,7 +114,7 @@ static int query_fsmonitor(int version, uint64_t last_update, struct strbuf *que
 	if (!(argv[0] = core_fsmonitor))
 		return -1;
 
-	snprintf(ver, sizeof(version), "%d", version);
+	snprintf(ver, sizeof(ver), "%d", version);
 	snprintf(date, sizeof(date), "%" PRIuMAX, (uintmax_t)last_update);
 	argv[1] = ver;
 	argv[2] = date;