am 578b7473: Merge "libsparse: Fix null pointer issue"

* commit '578b74734c1cfc773f3213a23a7195aa4b5b97aa':
  libsparse: Fix null pointer issue
diff --git a/libsparse/output_file.c b/libsparse/output_file.c
index b5ae419..5014e4a 100644
--- a/libsparse/output_file.c
+++ b/libsparse/output_file.c
@@ -675,6 +675,9 @@
 	} else {
 		out = output_file_new_normal();
 	}
+	if (!out) {
+		return NULL;
+	}
 
 	out->ops->open(out, fd);