use NULL rather than 0 for header pointers

1 files changed, 5 insertions, 5 deletions

diff --git a/URPM.xs b/URPM.xs
index d6453d0..1e0559e 100644
--- a/URPM.xs
+++ b/URPM.xs
@@ -823,7 +823,7 @@ pack_header(URPM__Package pkg) {
     }
 
     if (!(pkg->flag & FLAG_NO_HEADER_FREE)) pkg->h =headerFree(pkg->h);
-    pkg->h = 0;
+    pkg->h = NULL;
   }
 }
 
@@ -2782,7 +2782,7 @@ Db_traverse(db,callback)
       call_sv(callback, G_DISCARD | G_SCALAR);
 
       SPAGAIN;
-      pkg->h = 0; /* avoid using it anymore, in case it has been copied inside callback */
+      pkg->h = NULL; /* avoid using it anymore, in case it has been copied inside callback */
     }
     ++count;
   }
@@ -2836,7 +2836,7 @@ Db_traverse_tag(db,tag,names,callback)
 	  call_sv(callback, G_DISCARD | G_SCALAR);
 
 	  SPAGAIN;
-	  pkg->h = 0; /* avoid using it anymore, in case it has been copied inside callback */
+	  pkg->h = NULL; /* avoid using it anymore, in case it has been copied inside callback */
 	}
 	++count;
       }
@@ -2881,7 +2881,7 @@ Db_traverse_tag_find(db,tag,name,callback)
       int count = call_sv(callback, G_SCALAR);
 
       SPAGAIN;
-      pkg->h = 0; /* avoid using it anymore, in case it has been copied inside callback */
+      pkg->h = NULL; /* avoid using it anymore, in case it has been copied inside callback */
 
       if (count == 1 && POPi) {
 	found = 1;
@@ -3027,7 +3027,7 @@ Trans_traverse(trans, callback)
       PUTBACK;
       call_sv(callback, G_DISCARD | G_SCALAR);
       SPAGAIN;
-      pkg->h = 0; /* avoid using it anymore, in case it has been copied inside callback */
+      pkg->h = NULL; /* avoid using it anymore, in case it has been copied inside callback */
     }
     ++c;
   }