Fix dropping clip in timeline can lead to crash if drop ended outside timeline

1 job for master in 47 seconds
Status Job ID Name Coverage
failed #35822
linux kf5-qt5 qt5.12


Name Stage Failure
linux kf5-qt5 qt5.12 Build

Skipping Git submodules setup
$ git clone --depth=1 $CI_TOOLING
Cloning into '/build/ci-tooling'...
fatal: unable to access '': OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to
Uploading artifacts...
WARNING: JUnitTestResults.xml: no matching files
ERROR: No files to upload
ERROR: Job failed: exit code 1