(svn r26541) [1.4] -Backport from trunk:

- Fix: Prevent comparing to NULL when strndup could not allocate memory (r26476)
- Fix: Potentially undefined shifts in NewGRF code (r26475)
- Fix: Make sure there is no uninitialised sprite data (r26473)
- Fix: Draw text shadow for ellipses (r26467)
- Fix: Add special handling for PALETTE_CRASH to work for non-8bpp-mapped sprites (r26463)

known-bugs.txt

@@ -33,12 +33,13 @@ No suitable AI can be found
 	If you have no AIs and an AI is started the so-called 'dummy' AI will
 	be loaded. This AI does nothing but writing a message on the AI debug
 	window and showing a red warning. There are basically two solutions
-	for this problem: you must change the settings so no AI is started,
-	this is done in the difficulty settings window. The other solution is
-	acquiring (downloading) some AI. The easiest way to do this is via
-	the "Check Online Content" button in the main (intro) menu or via
-	"AI Settings" -> "Select AI" -> "Check Online Content" which is also
-	accessed via the main menu.
+	for this problem: Either you set the number of AI players to 0 so that
+	no AI is started. You find that setting at the top of the window in the
+	"AI / Game Scripts Settings" window.
+	The other solution is acquiring (downloading) some AI. The easiest way
+	to do this is via the "Check Online Content" button in the main (intro)
+	menu or directly in the "AI / Game Scripts Settings" dialogue via the
+	"Check Online Content" button.
 
 After a while of playing, colours get corrupted
 	In Windows 7 the background slideshow corrupts the colour mapping of