Double free crash

(closes issue #17245)
 Reported by: thedavidfactor
 Patches: 
       20100426__issue17245.diff.txt uploaded by tilghman (license 14)
 Tested by: murraytm


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@261917 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_odbc.c

@@ -331,6 +331,7 @@ static int acf_odbc_write(struct ast_channel *chan, const char *cmd, char *s, co
 
 			if (obj && !transactional) {
 				ast_odbc_release_obj(obj);
+				obj = NULL;
 			}
 		}
 	}
@@ -350,6 +351,8 @@ static int acf_odbc_write(struct ast_channel *chan, const char *cmd, char *s, co
 				SQLRowCount(stmt, &rows);
 				break;
 			}
+			ast_odbc_release_obj(obj);
+			obj = NULL;
 		}
 	} else if (stmt) {
 		status = "SUCCESS";