[Bug 501531] [NEW] Controls incorrect - Pacman stalling when turning into a wall

[Mike Birch]

Public bug reported:

Binary package hint: pacman

Turning into a wall should not stall pacman (he's very hard to actually
stop short of running head-on into one).

The simplest fix is that if he can't go in a new direction, he should
try continuing in the old one so in pacman.cc:

int Pacman::go(direction dd,Gamedata *da) {//what direction to try to move it
typ w;					//what's at new coordinates
int i=1;	//this i is returned: it is whether pacman moved or not.
int xx,yy;	//possible next coordinates
direction old_d = d;	// Save old direction (NEW_LINE)
if (dd!=none) try_d=d=dd;//if a direction!=none given, set the two directions
      ....
w=b->what_is(xx,yy);	//what's at new coordinates

switch (w) {		//if it's
 case classSpecialWall: case classWall: //can't move through walls
  {if  (old_d != dd) return go (old_d, da);	//	If we can't change direction, try to keep going (NEW_LINE)
   i=0; d=still; } break;
    ....
return i;	//this i is returned: it is whether pacman moved or not.
}

** Affects: pacman (Ubuntu)
     Importance: Undecided
         Status: New

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Controls incorrect - Pacman stalling when turning into a wall
https://bugs.launchpad.net/bugs/501531
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