Merged revisions 283350 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

........
  r283350 | russell | 2010-08-24 07:49:41 -0500 (Tue, 24 Aug 2010) | 2 lines
  
  Don't attempt to release a NULL ODBC handle.
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@283351 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_odbc.c

@@ -502,8 +502,10 @@ static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, cha
 		if (stmt) {
 			break;
 		}
-		ast_odbc_release_obj(obj);
-		obj = NULL;
+		if (obj) {
+			ast_odbc_release_obj(obj);
+			obj = NULL;
+		}
 	}
 
 	if (!stmt) {