Prevent crashes in res_config_odbc due to uninitialized string fields.

Patches:
    odbc-crash.patch by John Hardin (License #6512)
........

Merged revisions 413241 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@413251 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_config_odbc.c

@@ -744,6 +744,10 @@ static int store_odbc(const char *database, const char *table, va_list ap)
 		return -1;
 	}
 
+	if (ast_string_field_init(&cps, 256)) {
+		return -1;
+	}
+
 	obj = ast_odbc_request_obj2(database, connected_flag);
 	if (!obj) {
 		return -1;
@@ -824,6 +828,10 @@ static int destroy_odbc(const char *database, const char *table, const char *key
 		return -1;
 	}
 
+	if (ast_string_field_init(&cps, 256)) {
+		return -1;
+	}
+
 	obj = ast_odbc_request_obj2(database, connected_flag);
 	if (!obj) {
 		return -1;