Additional checking for existence etercifs kernel module sources for current kernel

etercifs/functions.sh

@@ -36,6 +36,7 @@ detect_etercifs_sources()
     [ -n "$ETERCIFS_SOURCES_LIST" ] || ETERCIFS_SOURCES_LIST=$DATADIR/sources/kernel-source-etercifs*
     [ -n "`ls $ETERCIFS_SOURCES_LIST`" ] || fatal "Etercifs kernel module sources does not installed!"
     KERNEL_SOURCE_ETERCIFS_LINK=`ls -1 $ETERCIFS_SOURCES_LIST | grep $KERNEL | sort -r | head -n 1`
+    [ -f "$KERNEL_SOURCE_ETERCIFS_LINK" ] || fatal "Etercifs kernel module sources for current kernel does not installed!"
     KERNEL_SOURCE_ETERCIFS=`readlink -f $KERNEL_SOURCE_ETERCIFS_LINK`
     [ "$KERNEL_SOURCE_ETERCIFS" ] || fatal "Etercifs kernel module sources for current kernel does not installed!"
 }