Catch case with no initramfs compression supported by kernel (bug #423847)

ChangeLog

@@ -5,6 +5,10 @@
 # Distributed under the GPL v2
 # $Id$
 
+  08 Jul 2012; Sebastian Pipping <sping@gentoo.org> gen_configkernel.sh,
+  gen_initramfs.sh:
+  Catch case with no initramfs compression supported by kernel (bug #423847)
+
   08 Jul 2012; Sebastian Pipping <sping@gentoo.org> gen_configkernel.sh,
   gen_initramfs.sh:
   Fix detection of initramfs compression with bzip2 as best candidate

gen_initramfs.sh

@@ -790,6 +790,7 @@ create_initramfs() {
 							[[ ${COMPRESS_INITRD_TYPE} == best ]] && break
 						fi
 					done
+					[[ -z "${compression}" ]] && gen_die "None of the initramfs we tried are supported by your kernel (config file \"${KERNEL_CONFIG}\"), strange!?"
 					;;
 				*)
 					gen_die "Compression '${COMPRESS_INITRD_TYPE}' unknown"