Fix for mobs and pet movement - Updated

[Doodman]

One note:

...
...
      ratio = (speed/target_distance);

   	  if(target_distance >= speed)  // If we need to go father than we can in one cycle... 
      { 
         x_pos += tar_vx * ratio;
         y_pos += tar_vy * ratio;
		 if(tar_vz>2)
			z_pos += tar_vz * ratio;
		 else
			z_pos = z;
      } 
      else //If we are with-in our one cycle distance... 
      { 
         x_pos = x; 
         y_pos = y; 
         z_pos = z;  
      } 
...
...

Should be:

...
...
   	  if(target_distance >= speed)  // If we need to go father than we can in one cycle... 
      { 
         ratio = (speed/target_distance);

         x_pos += tar_vx * ratio;
         y_pos += tar_vy * ratio;
		 if(tar_vz>2)
			z_pos += tar_vz * ratio;
		 else
			z_pos = z;
      } 
      else //If we are with-in our one cycle distance... 
      { 
         x_pos = x; 
         y_pos = y; 
         z_pos = z;  
      } 
...
...

Since ratio is only used in there, no point in wasting cycles on the division.