Fix a panic caused by a corrupted table when the header is

still valid. We were checking the state of the header and
not the table.

PR:		119868
Based on a patch from:	Jaakko Heinonen <jh@saunalahti.fi>
MFC after: 1 week

sys/geom/part/g_part_gpt.c

@@ -625,13 +625,16 @@ g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
 	if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK &&
 	    table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
 	    !gpt_matched_hdrs(&prihdr, &sechdr)) {
-		if (table->state[GPT_ELT_PRITBL] == GPT_STATE_OK)
+		if (table->state[GPT_ELT_PRITBL] == GPT_STATE_OK) {
 			table->state[GPT_ELT_SECHDR] = GPT_STATE_INVALID;
-		else
+			table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
+		} else {
 			table->state[GPT_ELT_PRIHDR] = GPT_STATE_INVALID;
+			table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
+		}
 	}
 
-	if (table->state[GPT_ELT_PRIHDR] != GPT_STATE_OK) {
+	if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK) {
 		printf("GEOM: %s: the primary GPT table is corrupt or "
 		    "invalid.\n", pp->name);
 		printf("GEOM: %s: using the secondary instead -- recovery "
@@ -641,7 +644,7 @@ g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
 		if (pritbl != NULL)
 			g_free(pritbl);
 	} else {
-		if (table->state[GPT_ELT_SECHDR] != GPT_STATE_OK) {
+		if (table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
 			printf("GEOM: %s: the secondary GPT table is corrupt "
 			    "or invalid.\n", pp->name);
 			printf("GEOM: %s: using the primary only -- recovery "