updated for version 7.4.445
Problem:    Clipboard may be cleared on startup.
Solution:   Set clip_did_set_selection to -1 during startup. (Christian
	    Brabandt)
Added tag v7-4-445 for changeset 1138726736fb
updated for version 7.4.446
Problem:    In some situations, when setting up an environment to trigger an
	    autocommand, the environment is not properly restored.
Solution:   Check the return value of switch_win() and call restore_win()
	    always.  (Daniel Hahler)
Added tag v7-4-446 for changeset 63121fdd093f
updated for version 7.4.447
Problem:    Spell files from Hunspell may generate a lot of errors.
Solution:   Add the IGNOREEXTRA flag.
Added tag v7-4-447 for changeset 0d2c821cdc25
updated for version 7.4.448
Problem:    Using ETO_IGNORELANGUAGE causes problems.
Solution:   Remove this flag. (Paul Moore)
Added tag v7-4-448 for changeset 2fd96725b063
updated for version 7.4.449
Problem:    Can't easily close the help window. (Chris Gaal)
Solution:   Add ":helpclose". (Christian Brabandt)
Added tag v7-4-449 for changeset cb5480096f1b
updated for version 7.4.450
Problem:    Not all commands that edit another buffer support the +cmd
	    argument.
Solution:   Add the +cmd argument to relevant commands. (Marcin Szamotulski)
Added tag v7-4-450 for changeset 7c9abc70ffc1
updated for version 7.4.451
Problem:    Calling system() with empty input gives an error for writing the
	    temp file.
Solution:   Do not try writing if the string length is zero. (Olaf Dabrunz)
Added tag v7-4-451 for changeset ac6cfdc02695
updated for version 7.4.452
Problem:    Can't build with tiny features. (Tony Mechelynck)
Solution:   Use "return" instead of "break".
Added tag v7-4-452 for changeset 78aad99db762
updated for version 7.4.453
Problem:    Still can't build with tiny features.
Solution:   Add #ifdef.
Added tag v7-4-453 for changeset c72eb8499a9d
Updated runtime files.