compress stored files in zip_replace_zip

--HG--
branch : HEAD

lib/zip_replace_zip.c

diff --git a/lib/zip_replace_zip.c b/lib/zip_replace_zip.c
index 637f7b5..bae17df 100644
--- a/lib/zip_replace_zip.c
+++ b/lib/zip_replace_zip.c
@@ -35,7 +35,8 @@
 	return -1;
     }
 
-    if (start == 0 && (len == 0 || len == -1)) {
+    if ((srczf->entry[srcidx].meta->comp_method == 8
+	 && start == 0 && (len == 0 || len == -1))) {
 	if ((z=(struct read_zip *)malloc(sizeof(struct read_zip))) == NULL) {
 	    zip_err = ZERR_MEMORY;
 	    return -1;