Bug#425234: libshadow-ruby1.8: Better patch for segfault

[Matthew Palmer]

The attached patch, from Kostas Georgiou (the Fedora maintainer for
shadow-ruby), expands on my earlier fix, by also correcting problems with
calls to other functions.  Please use this patch in preference to my earlier
attempt.

- Matt

--- shadow-1.4.1/shadow.c-orig  2007-05-15 13:09:41.000000000 +0100
+++ shadow-1.4.1/shadow.c       2007-05-15 13:18:17.000000000 +0100
@@ -60,7 +60,7 @@
                      INT2FIX(entry->sp_inact),
                      INT2FIX(entry->sp_expire),
                      INT2FIX(entry->sp_flag),
-                     0);
+                     NULL);
   free(entry);
   return result;
 };
@@ -89,7 +89,7 @@
                      INT2FIX(entry->sp_inact),
                      INT2FIX(entry->sp_expire),
                      INT2FIX(entry->sp_flag),
-                     0);
+                     NULL);
   return result;
 };
 
@@ -114,7 +114,7 @@
                      INT2FIX(entry->sp_inact),
                      INT2FIX(entry->sp_expire),
                      INT2FIX(entry->sp_flag),
-                     0);
+                     NULL);
   return result;
 };
 
@@ -142,7 +142,7 @@
                      INT2FIX(entry->sp_inact),
                      INT2FIX(entry->sp_expire),
                      INT2FIX(entry->sp_flag),
-                     0);
+                     NULL);
   return result;
 };
 
@@ -254,10 +254,10 @@
   rb_sPasswdEntry = rb_struct_define("PasswdEntry",
                                     "sp_namp","sp_pwdp","sp_lstchg",
                                     "sp_min","sp_max","sp_warn",
-                                    "sp_inact","sp_expire","sp_flag",0);
+                                    "sp_inact","sp_expire","sp_flag",NULL);
   rb_sGroupEntry = rb_struct_define("GroupEntry",
                                    "sg_name","sg_passwd",
-                                   "sg_adm","sg_mem",0);
+                                   "sg_adm","sg_mem",NULL);
 
   rb_mShadow = rb_define_module("Shadow");
   rb_eFileLock = rb_define_class_under(rb_mShadow,"FileLock",rb_eException);