bzip2/lzma: don't stop search at first unconfigured compression

Impact: Bugfix, avoids kernels which build but panic on boot

Fix a bug in decompress.c : only scanned until the first
non-configured compressor (with disastrous result especially if that
was gzip.)

Signed-off-by: Alain Knaff <alain@knaff.lu>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/lib/decompress.c b/lib/decompress.c
index 961f367..d2842f5 100644
--- a/lib/decompress.c
+++ b/lib/decompress.c
@@ -43,7 +43,7 @@
 	if (len < 2)
 		return NULL;	/* Need at least this much... */
 
-	for (cf = compressed_formats; cf->decompressor; cf++) {
+	for (cf = compressed_formats; cf->name; cf++) {
 		if (!memcmp(inbuf, cf->magic, 2))
 			break;