#include limits.h (for INT_MAX)

REF: <a8e45e1b0601241753j1e14cc1cm3fc3c65c7acb0c1b@mail.gmail.com>

src/drv_imap.c

@@ -31,6 +31,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <stddef.h>
+#include <limits.h>
 #include <errno.h>
 #include <string.h>
 #include <ctype.h>