Don't use FLT_MAX for Actor::EstimateJumpHeight

Undefined sanitizer's complaint:

../Source/System/PathFinder.cpp:176:54: runtime error: 3.40282e+38 is outside the range of representable values of type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../Source/System/PathFinder.cpp:176:54

...Also change a comment slightly lol

Author: Architector4

Source/Entities/Actor.cpp

@@ -1047,7 +1047,8 @@ float Actor::EstimateDigStrength() const {
 }
 
 float Actor::EstimateJumpHeight() const {
-	return FLT_MAX;
+	// By default, assume actors can jump as far as the scene stretches upward, twice over.
+	return g_SceneMan.GetSceneHeight() * c_MPP * 2;
 }
 
 void Actor::VerifyMOIDs() {

Source/System/PathFinder.cpp

@@ -173,7 +173,7 @@ int PathFinder::CalculatePath(Vector start, Vector end, std::list<Vector>& pathR
 	s_JumpHeight = jumpHeight;
 
 	// How high up we can jump from this node
-	s_JumpHeightVertical = std::max(1, static_cast<int>(jumpHeight / (m_NodeDimension * c_MPP))); // min of 1 so automovers work a bit better
+	s_JumpHeightVertical = std::max(1, static_cast<int>(jumpHeight / (m_NodeDimension * c_MPP))); // at least 1 so automovers work a bit better
 	s_JumpHeightDiagonal = std::max(1, static_cast<int>((jumpHeight * 0.7F) / (m_NodeDimension * c_MPP)));
 
 	// Actors capable of digging can use s_DigStrength to modify the node adjacency cost.