Prevent PHP error if getNextPrevNews returns a boolean
French Update

I finally found exerpts of ISO 12232 in English and French for EXIF
terminology
allow sublocales for TinyMce
remove wrong setting of $locale
static html cache should differ between news articles and news categories as both could have the same titlelink
User rights merging fixes
Update sitemap-extended-admin.php

typo
Update admin-edit.php

typo
Merge pull request #544 from sphoto/patch-11

Update admin-edit.php
Merge pull request #543 from sphoto/patch-10

Update sitemap-extended-admin.php
Update menu_tab_edit.php

typo
Merge pull request #546 from sphoto/patch-12

Update menu_tab_edit.php
tiny mce language language files with subdomains
Update menu_tab.php

typo
Update admin-categories.php

typo
Update admin-users.php

typo
Merge pull request #547 from sphoto/patch-13

Update menu_tab.php
Merge pull request #548 from sphoto/patch-14

Update admin-categories.php
Merge pull request #550 from sphoto/patch-16

Update admin-users.php
Update admin-options.php

typo