(util_printenv): Change return type to void. All callers updated.

@@ -332,7 +332,7 @@ extern struct mail_env_entry *util_find_env (const char *var, int create);
 extern int util_getenv (void *ptr, const char *variable,
 			mail_env_data_t type, int warn);
 
-extern int util_printenv (int set);
+extern void util_printenv (int set);
 extern int util_setenv (const char *name, void *value,
 		        mail_env_data_t type, int overwrite);
 extern int util_isdeleted (size_t msgno);

@@ -31,7 +31,8 @@ mail_set (int argc, char **argv)
 {
   if (argc < 2)
     {
-      return util_printenv (1);
+      util_printenv (1);
+      return 0;
     }
   else
     {

@@ -26,7 +26,10 @@ int
 mail_unset (int argc, char **argv)
 {
   if (argc < 2)
-    return util_printenv (0);
+    {
+      util_printenv (0);
+      return 0;
+    }
   else
     {
       int status = 0, i = 1;

@@ -589,7 +589,7 @@ envp_comp (const void *a, const void *b)
   return strcmp ((*epa)->var, (*epb)->var);
 }
 
-int
+void
 util_printenv (int set)
 {
   struct mail_env_entry **ep;