Include sys/types.h for u_int32_t

Author: AMDmi3

src/lib/md5/md5.h

@@ -43,7 +43,7 @@
 #ifdef WIN32
 typedef unsigned int UINT4;
 #else
-#include <stdlib.h> //typedef of u_int32_t
+#include <sys/types.h> //typedef of u_int32_t
 /* typedef a 32 bit type */
 typedef u_int32_t UINT4;
 #endif