Second result should not contain data from the first result.

(closes issue #15039)
 Reported by: jims
 Patches: 
       20090506__issue15039.diff.txt uploaded by tilghman (license 14)
 Tested by: jims


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@193006 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_odbc.c

@@ -524,6 +524,7 @@ static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, cha
 	status = "SUCCESS";
 
 	for (y = 0; y < rowlimit; y++) {
+		buf[0] = '\0';
 		for (x = 0; x < colcount; x++) {
 			int i;
 			struct ast_str *coldata = ast_str_thread_get(&coldata_buf, 16);