Removed trailing spaces in the most relevant files

Command used for the job:
egrep -rl ' $' --include *.c --include *.h --include  *.s --include  *.inc --include  *.txt *  | xargs sed -i 's/\s\+$//g'

Credits to Grant Murphy from Stack Overflow.

src/battle_anim_fire.c

@@ -658,7 +658,7 @@ void AnimFireRing(struct Sprite *sprite)
 }
 
 static void AnimFireRing_Step1(struct Sprite *sprite)
-{   
+{
     UpdateFireRingCircleOffset(sprite);
 
     if (++sprite->data[0] == 0x12)
@@ -718,7 +718,7 @@ static void UpdateFireRingCircleOffset(struct Sprite *sprite)
 // arg 1: initial y pixel offset
 // arg 2: duration
 // arg 3: x delta
-// arg 4: y delta 
+// arg 4: y delta
 // AnimFireCross(struct Sprite *sprite)
 static void AnimFireCross(struct Sprite *sprite)
 {
@@ -1091,7 +1091,7 @@ static void AnimWillOWispOrb(struct Sprite *sprite)
     case 2:
         sprite->x2 = Sin(sprite->data[2], sprite->data[4]);
         sprite->data[2] = (sprite->data[2] + 4) & 0xFF;
-        
+
         if (++sprite->data[3] == 31)
         {
             sprite->x += sprite->x2;