mtdparts: Fix uninitialized scalar usage

When reworking this code to fix other issues found by Coverity, I forgot
to ensure tmp_ep was always cleared before use.

Reported-by: Coverity (CID: 166612)
Fixes: bc028345 ("mtdparts: Fix final outstanding issue reported by Coverity")
Signed-off-by: NTom Rini <trini@konsulko.com>

cmd/mtdparts.c

@@ -1751,6 +1751,7 @@ int mtdparts_init(void)
 	/* save it for later parsing, cannot rely on current partition pointer
 	 * as 'partition' variable may be updated during init */
 	memset(tmp_parts, 0, sizeof(tmp_parts));
+	memset(tmp_ep, 0, sizeof(tmp_ep));
 	if (current_partition)
 		strncpy(tmp_ep, current_partition, PARTITION_MAXLEN);