Refactored and fixed speed patch related code (from Mr.Stalin)

Rewrote ASM code of WorldMapFpsPatch functions.

artifacts/ddraw.ini

@@ -34,18 +34,21 @@ Enable=1
 ;The speeds corresponding to each slot in percent. (i.e. 100 is normal speed)
 SpeedMulti0=50
 SpeedMulti1=100
-SpeedMulti2=150
-SpeedMulti3=200
-SpeedMulti4=300
+SpeedMulti2=200
+SpeedMulti3=300
+SpeedMulti4=400
 SpeedMulti5=500
-SpeedMulti6=1000
-SpeedMulti7=100
-SpeedMulti8=100
-SpeedMulti9=100
+SpeedMulti6=600
+SpeedMulti7=700
+SpeedMulti8=800
+SpeedMulti9=900
 
 ;The initial speed at game startup
 SpeedMultiInitial=100
 
+;Set to 1 to also affect video playback and slideshow speed
+AffectPlayback=0
+
 ;XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
 [Graphics]
 ;Set to 0 for 8 bit fullscreen