part_efi: make sure the gpt_pte is freed

the gpt_pte wasn't being freed if it was checked against an invalid
partition. The resulting memory leakage could make it impossible
to repeatedly attempt to load non-existent files in a script.

Also, downgrade the message for not finding an invalid partition
from a printf() to a debug() so as to minimize message spam in
perfectly normal situations.

Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com>

disk/part_efi.c

@@ -164,8 +164,9 @@ int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
 
 	if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
 	    !is_pte_valid(&gpt_pte[part - 1])) {
-		printf("%s: *** ERROR: Invalid partition number %d ***\n",
+		debug("%s: *** ERROR: Invalid partition number %d ***\n",
 			__func__, part);
+		free(gpt_pte);
 		return -1;
 	}