updated for version 7.4.421
Problem:    Crash when searching for "\ze*". (Urtica Dioica)
Solution:   Disallow a multi after \ze and \zs.
Added tag v7-4-421 for changeset 3ee39fe2df7d
updated for version 7.4.422
Problem:    When using conceal with linebreak some text is not displayed
	    correctly. (Grüner Gimpel)
Solution:   Check for conceal mode when using linebreak. (Christian Brabandt)
Added tag v7-4-422 for changeset 69da1498ce89