(svn r3752) FYOS avoid to cast function pointers

(svn r3751) -Fix: Correctly implement minimum search, so road vehicles head twoards the closest station, not the last one in the list

(svn r3750) Use INVALID_STATION instead of -1 in NPF

(svn r3749) -Fix: [FS#61] The tooltips for raising and lowering land buttons in the scenario editor are interchanged (Reported and fixed by lc)

(svn r3748) Remove bubblesort(), it's unused

(svn r3747) Change HASBIT() to return 0/1 instead of 0/value of tested bit, because the name suggests it does the former and current behavior broke in some places in very subtle ways (for example HASBIT(x, 0) != HASBIT(y, 1) doesn't work, returning a bool after HASBIT(x, 9) neither)

(svn r3746) - [7/7] Moving the callback functions for the setting-changes from settings_gui.c to settings.c. Also enable the callback functionality through the console.
- Fix a nasty bug with improper counter addition. (*i)++ and NOT *i++ when setting a patch value through the console.

(svn r3745) Fix two buffer overflows, one case of undefined behavior (the destination buffer of sprintf() may not alias with one of its arguments) and some other minor stuff introduced in r3740

(svn r3742) -codechange: [OSX] changed an assert to use the new error window and added another two to show if the screen buffer fails for some reason in cocoa driver (instead of just crashing)

(svn r3741) -Fix: [i686 OSX] reverted the change in rev 3670 for non PowerPC (done with #ifdef) since it appeared to crash intel based macs
This fix is not a good solution and might not work, but if it works, it's better than nothing until we get the real solution