cursor (#2390597).
Make snippets complete even when text is to the right of the
cursor and the hidden pref is not set, unless the snippet
completion key is space.
Fix possible memory leak when reading current word.
Add editor_read_word_stem().



git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@3370 ea778897-0a13-0410-b9d1-a72fbfd435f5