fix regression in start-testsuite.sh (false shellcheck advice)

Change-Id: If05d13c0dedfedf517005e5418acc677ddc5e75f
diff --git a/start-testsuite.sh b/start-testsuite.sh
index 61bf771..8affdba 100755
--- a/start-testsuite.sh
+++ b/start-testsuite.sh
@@ -19,4 +19,4 @@
 	TEST=$3
 fi
 
-LD_LIBRARY_PATH=$(dirname "$SUITE"):/usr/lib/titan:/usr/ttcn3/lib ttcn3_start "$SUITE" "$CFG" "$TEST"
+LD_LIBRARY_PATH=$(dirname "$SUITE"):/usr/lib/titan:/usr/ttcn3/lib ttcn3_start $SUITE $CFG $TEST