bunzip2/gunzip/uncompress/unlzma: merge into common code -
fix few corner cases, reduce size by 450 bytes. Update testsuite.
diff --git a/archival/rpm.c b/archival/rpm.c
index 9ab12df..a48dda3 100644
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -203,7 +203,7 @@
 	if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
 		bb_error_msg_and_die("invalid gzip magic");
 	}
-	check_header_gzip(archive_handle->src_fd);
+	check_header_gzip_or_die(archive_handle->src_fd);
 	xchdir("/"); /* Install RPM's to root */
 
 	archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);