[svn] Fix a compile error about M_PI_2.

Update Felmyst script to test new setActive function.
Fix the bug that priest's fear is unbreakable (dirty hack before find the correct way).
(some unfinished unused content included, just ignore them, will finish them later)

--HG--
branch : trunk

src/game/Object.cpp

@@ -1537,5 +1537,5 @@ void WorldObject::GetRandomContactPoint( const WorldObject* obj, float &x, float
 	float angle_offset_ratio = 1 - object_size/12.0f;
 	if (angle_offset_ratio < 0.05) angle_offset_ratio = 0.05;
 	// angle to face `obj` to `this`plus a random angle offset(from -90 degree to 90 degree)*angle_offset_ratio using distance from distance2dMin to distance2dMax includes size of `obj`
-	GetNearPoint(obj,x,y,z,object_size,distance2dMin+(distance2dMax-distance2dMin)*rand_norm(), GetAngle( obj ) + (M_PI_2 - M_PI * rand_norm()) * angle_offset_ratio);
+	GetNearPoint(obj,x,y,z,object_size,distance2dMin+(distance2dMax-distance2dMin)*rand_norm(), GetAngle( obj ) + (M_PI/2 - M_PI * rand_norm()) * angle_offset_ratio);
 }