tests/settings: Add fs_file_t type variable initializations

The commit adds initializations of fs_file_t variables in preparation
for fs_open function change that will require fs_file_t object, passed
to the function, to be initialized before first usage.

Signed-off-by: Dominik Ermel <[email protected]>

Author: de-nordic

tests/subsys/settings/fs/src/settings_test_fs.c

@@ -151,6 +151,8 @@ int fsutil_read_file(const char *path, off_t offset, size_t len, void *dst,
 	int rc;
 	ssize_t r_len = 0;
 
+	fs_file_t_init(&file);
+
 	rc = fs_open(&file, path, FS_O_CREATE | FS_O_RDWR);
 	if (rc != 0) {
 		return rc;
@@ -172,6 +174,8 @@ int fsutil_write_file(const char *path, const void *data, size_t len)
 	struct fs_file_t file;
 	int rc;
 
+	fs_file_t_init(&file);
+
 	rc = fs_open(&file, path, FS_O_CREATE | FS_O_RDWR);
 	if (rc != 0) {
 		return rc;