added missing header file

Author: dmalan

Makefile

@@ -25,7 +25,7 @@ DESCRIPTION = CS50 Library for C
 MAINTAINER = CS50 <sysadmins@cs50.harvard.edu>
 NAME = libcs50
 OLD_NAMES = lib50-c library50-c
-VERSION = 7.2.0
+VERSION = 7.2.1
 
 .PHONY: bash
 bash:

src/cs50.c

@@ -42,6 +42,7 @@
 
 #include <ctype.h>
 #include <errno.h>
+#include <limits.h>
 #include <math.h>
 #include <stdarg.h>
 #include <stdint.h>