[rt46602] Assign default values to variables set by command line options and consistently treat them as integers

(cherry picked from commit fe51c34df3)

bin/tests/system/clean.sh

@@ -19,6 +19,8 @@ SYSTEMTESTTOP=.
 # the tests will call "testsummary.sh", which will concatenate all test output
 # files into a single systests.output.
 
+runall=0
+
 while getopts "r" flag; do
     case $flag in
 	r) runall=1 ;;
@@ -35,7 +37,7 @@ fi
 systest=$1
 shift
 
-if [ "$runall" = "" ]; then
+if [ $runall -eq 0 ]; then
     rm -f $systest/test.output
 fi
 

bin/tests/system/testsummary.sh

@@ -24,6 +24,8 @@
 SYSTEMTESTTOP=.
 . $SYSTEMTESTTOP/conf.sh
 
+keepfile=0
+
 while getopts "n" flag; do
     case $flag in
 	n) keepfile=1 ;;
@@ -32,7 +34,7 @@ while getopts "n" flag; do
 done
 
 cat */test.output > systests.output 2> /dev/null
-if [ "$keepfile" = "" ]; then
+if [ $keepfile -eq 0 ]; then
     rm -f */test.output
 fi