Add 'Bugs to watch out for' section.

git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@5258 ea778897-0a13-0410-b9d1-a72fbfd435f5

ChangeLog

@@ -18,6 +18,8 @@
    doc/geany.html:
    Add hidden pref new_document_after_close for whether to open a new
    document automatically, off by default.
+ * HACKING:
+   Add 'Bugs to watch out for' section.
 
 
 2010-09-22  Nick Treleaven  <nick(dot)treleaven(at)btinternet(dot)com>

HACKING

@@ -250,6 +250,13 @@ Testing
   passing ``-c some_dir`` (but make sure the directory is clean first).
 * For debugging tips, see `GDB`_.
 
+Bugs to watch out for
+---------------------
+* Forgetting to check *doc->is_valid* when looping through
+  *documents_array* - instead use *foreach_document()*.
+* Not breaking the plugin ABI when necessary.
+* Using an idle callback that doesn't check main_status.quitting.
+
 Libraries
 ---------
 We try to use an unmodified version of Scintilla - any new lexers or