tests/btrfs.c: fix btrfs-v for BTRFS_IOC_TREE_SEARCH

* tests/btrfs.c (btrfs_test_send_ioctl): Assign key_reference
to search_args for BTRFS_IOC_TREE_SEARCH ioctl tests.
diff --git a/tests/btrfs.c b/tests/btrfs.c
index ee731bb..d2b1637 100644
--- a/tests/btrfs.c
+++ b/tests/btrfs.c
@@ -851,7 +851,7 @@
 	ioctl(-1, BTRFS_IOC_TREE_SEARCH_V2, NULL);
 	printf("ioctl(-1, BTRFS_IOC_TREE_SEARCH_V2, NULL) = -1 EBADF (%m)\n");
 
-	search_args_v2.key = key_reference;
+	search_args.key = key_reference;
 	printf("ioctl(-1, BTRFS_IOC_TREE_SEARCH, {");
 	btrfs_print_search_key(&search_args.key);
 	ioctl(-1, BTRFS_IOC_TREE_SEARCH, &search_args);
@@ -866,7 +866,7 @@
 
 	key_reference.min_objectid = 6;
 	key_reference.max_objectid = 7;
-	search_args_v2.key = key_reference;
+	search_args.key = key_reference;
 	printf("ioctl(-1, BTRFS_IOC_TREE_SEARCH, {");
 	btrfs_print_search_key(&search_args.key);
 	ioctl(-1, BTRFS_IOC_TREE_SEARCH, &search_args);
@@ -881,7 +881,7 @@
 
 	key_reference.min_offset++;
 	key_reference.max_offset--;
-	search_args_v2.key = key_reference;
+	search_args.key = key_reference;
 	printf("ioctl(-1, BTRFS_IOC_TREE_SEARCH, {");
 	btrfs_print_search_key(&search_args.key);
 	ioctl(-1, BTRFS_IOC_TREE_SEARCH, &search_args);
@@ -896,7 +896,7 @@
 
 	key_reference.min_transid++;
 	key_reference.max_transid--;
-	search_args_v2.key = key_reference;
+	search_args.key = key_reference;
 	printf("ioctl(-1, BTRFS_IOC_TREE_SEARCH, {");
 	btrfs_print_search_key(&search_args.key);
 	ioctl(-1, BTRFS_IOC_TREE_SEARCH, &search_args);
@@ -911,7 +911,7 @@
 
 	key_reference.min_type = 1;
 	key_reference.max_type = 12;
-	search_args_v2.key = key_reference;
+	search_args.key = key_reference;
 	printf("ioctl(-1, BTRFS_IOC_TREE_SEARCH, {");
 	btrfs_print_search_key(&search_args.key);
 	ioctl(-1, BTRFS_IOC_TREE_SEARCH, &search_args);