builtin-checkout.c: check error return from read_cache()

diff --git a/combine-diff.c b/combine-diff.c
index 5aa1104d3480f8057dd71c49bcf300eccabe2f9d..ec8df39bb01347eb035ad94553357b80af652b78 100644 (file)
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -213,6 +213,7 @@ static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
 
        parent_file.ptr = grab_blob(parent, &sz);
        parent_file.size = sz;
+       memset(&xpp, 0, sizeof(xpp));
        xpp.flags = XDF_NEED_MINIMAL;
        memset(&xecfg, 0, sizeof(xecfg));
        memset(&state, 0, sizeof(state));