picture: Fix up some docs
authorTimm Bäder <mail@baedert.org>
Mon, 18 Jun 2018 10:23:56 +0000 (12:23 +0200)
committerTimm Bäder <mail@baedert.org>
Mon, 18 Jun 2018 15:35:03 +0000 (17:35 +0200)
commit346ec706f75897c946ea54df03e9f49591d30c38
tree452dc8a1ff4294b89dbe1addfbc19879756d5a0b
parentd8274856def7a0c549fda5182b58a8fe374ece1c
picture: Fix up some docs

Use nullable instead of allow-none consistently, remove trailing
whitespace and fix some c&p problems.
gtk/gtkpicture.c