Fix the errors caused by fixing warnings!

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6592 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

lib/decode_rs.c

@@ -7,9 +7,9 @@
 #include <stdio.h>
 #endif
 
+#include <stdlib.h>
 #include <string.h>
 
-//#define NULL ((void *)0)
 #define	min(a,b)	((a) < (b) ? (a) : (b))
 
 #ifdef FIXED

lib/ftrsd/decode_rs.c

@@ -8,6 +8,7 @@
 #include <stdio.h>
 #endif
 
+#include <stdlib.h>
 #include <string.h>
 
 #define	min(a,b)	((a) < (b) ? (a) : (b))

lib/init_rs.c

@@ -13,8 +13,6 @@
 #include "char.h"
 #endif
 
-//#define NULL ((void *)0)
-
 void FREE_RS(void *p){
   struct rs *rs = (struct rs *)p;
 

lib/vit213.c

@@ -5,6 +5,8 @@
  * May be used under the terms of the GNU Public License
  */
 
+#include <stdlib.h>
+
 /* Select code here */
 
 #define V213

lib/vit216.c

@@ -18,8 +18,8 @@
 /* Rate 1/2 codes */
 unsigned int Poly216[] = {0126723, 0152711};	/* k = 16  */
 
+#include <stdlib.h>
 #include <memory.h>
-#define NULL ((void *)0)
 
 #define LONGBITS 32
 #define LOGLONGBITS 5