Fix flicker during mouse DND on Haiku as well

* src/haikuterm.c (haiku_read_socket): Don't clear tooltips on
crossing if track-mouse is drag-source and the display is
grabbed.
2 jobs for master in 55 minutes and 45 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Build Images
failed #46642
build-image-inotify

00:55:45

 
  Normal
skipped #46643
test-src-inotify
 
Name Stage Failure
failed
build-image-inotify Build Images
executor failed running [/bin/sh -c make bootstrap]: exit code: 2
Running after_script
Running after script...
$ test -n "$(docker ps -aq -f name=${test_name})" && docker cp ${test_name}:checkout/test ${test_name}
$ test -n "$(docker ps -aq -f name=${test_name})" && docker rm ${test_name}
$ find ${test_name} ! \( -name "*.log" -o -name ${EMACS_TEST_JUNIT_REPORT} \) -type f -delete
find: build-image-inotify-ce513544: No such file or directory
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1