DBAL-1197: [GH-835] backport bugfix to avoid fatal error in array_merge during generating the table creation SQL

[doctrinebot]

Jira issue originally created by user @doctrinebot:

This issue is created automatically through a Github pull request on behalf of dbu:

Url: #835

Message:

2.5 includes this fix in 1c9fe8d . this pull request is just to backport the bugfix without further changes.

i verified on jackalope/jackalope-doctrine-dbal#258 that this change indeed fixes the issue - but i don't know how to write a test for this.

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-835] was assigned:
#835

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-835] was merged:
#835

[doctrinebot]

Issue was closed with resolution "Fixed"

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.