log(fix): do not pipe stdout to /dev/null during crash log rotation

platform/kindle/koreader.sh

@@ -245,7 +245,7 @@ if [ "${FROM_KUAL}" == "yes" ] ; then
 fi
 
 # we keep maximum 100K worth of crash log
-cat crash.log &> /dev/null | tail -c 100000000 > crash.log.new
+cat crash.log 2> /dev/null | tail -c 100000000 > crash.log.new
 mv -f crash.log.new crash.log
 ./reader.lua "$@" >> crash.log 2>&1
 

platform/kobo/koreader.sh

@@ -112,7 +112,7 @@ if awk '$4~/(^|,)ro($|,)/' /proc/mounts | grep ' /mnt/sd ' ; then
 fi
 
 # we keep maximum 100K worth of crash log
-cat crash.log &> /dev/null | tail -c 100000000 > crash.log.new
+cat crash.log 2> /dev/null | tail -c 100000000 > crash.log.new
 mv -f crash.log.new crash.log
 ./reader.lua "${args}" >> crash.log 2>&1
 

platform/pocketbook/koreader.app

@@ -34,7 +34,7 @@ else
 fi
 
 # we keep maximum 100K worth of crash log
-cat crash.log &> /dev/null | tail -c 100000000 > crash.log.new
+cat crash.log 2> /dev/null | tail -c 100000000 > crash.log.new
 mv -f crash.log.new crash.log
 ./reader.lua "$args" >> crash.log 2>&1