Add an SDL sound backend and use it instead of spawning an external

[micropolis] / images / tiles-56.xpm

/* XPM */
static char *tiles___[] = {
/* columns rows colors chars-per-pixel */
"34 34 6 1",
"  c black",
". c #7F7F7F7F0000",
"X c #5D5D5D5D5D5D",
"o c yellow",
"O c gray75",
"+ c gray100",
/* pixels */
"OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO",
"Ooo    oooo    oooo    oooo    ooX",
"Ooo    oooo    oooo    oooo    ooX",
"OooXXXXXXXXXXXXXXXXXXXXXXXXXXXXooX",
"OooX                          OooX",
"O  X + + + + + + + + + + + +  O  X",
"O  X  + + +.X + + + + + + + + O  X",
"O  X +     XX      + + + + +  O  X",
"O  X  + + +.X + + + + + + + + O  X",
"OooX + + + .X+ + + + + + + +  OooX",
"OooX  + + +.X + + + + + + + + OooX",
"OooX +     XX      + + + + +  OooX",
"OooX  + + +.X + + + + + + + + OooX",
"O  X + + + .X+ + + +X+ + + +  O  X",
"O  X  + + +.X + +   X   + + + O  X",
"O  X + + + .X+ + + +X+ + + +  O  X",
"O  X  + + +.X + + + X + + + + O  X",
"OooX + + + .X+ +    X    + +  OooX",
"OooX  + + +.X + + + X + + + + OooX",
"OooX + + + .X+ + + +X+   X    OooX",
"OooX  + + +.X + + + X + +X+ + OooX",
"O  X + + + .X+ + + +X+   X    O  X",
"O  X  + + +.X + + + X + +X+ + O  X",
"O  X + + + .X+ + + +X+ + X +  O  X",
"O  X  + + +.X + + + X + +X+ + O  X",
"OooX + + + .X+ + + +X+ + X +  OooX",
"OooX  + + +.X + + + X + + + + OooX",
"OooX + + + .X+ + + + + + + +  OooX",
"OooX  + + + + + + + + + + + + OooX",
"O  X                          O  X",
"O  XOOOOOOOOOOOOOOOOOOOOOOOOOOO  X",
"O  oooo    oooo    oooo    oooo  X",
"O  oooo    oooo    oooo    oooo  X",
"OXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
};