Don't "jump" with 0 vertical velocity in all cases (bug #5106)

CHANGELOG.md

@@ -116,6 +116,7 @@
     Bug #5093: Hand to hand sound plays on knocked out enemies
     Bug #5099: Non-swimming enemies will enter water if player is water walking
     Bug #5105: NPCs start combat with werewolves from any distance
+    Bug #5106: Still can jump even when encumbered
     Bug #5110: ModRegion with a redundant numerical argument breaks script execution
     Feature #1774: Handle AvoidNode
     Feature #2229: Improve pathfinding AI

apps/openmw/mwmechanics/character.cpp

@@ -2065,7 +2065,8 @@ void CharacterController::update(float duration, bool animationOnly)
             cls.getCreatureStats(mPtr).setFatigue(fatigue);
         }
 
-        if(sneak || inwater || flying || incapacitated || !solid)
+        float z = cls.getJump(mPtr);
+        if(sneak || inwater || flying || incapacitated || !solid || z <= 0)
             vec.z() = 0.0f;
 
         bool inJump = true;
@@ -2088,7 +2089,6 @@ void CharacterController::update(float duration, bool animationOnly)
         else if(vec.z() > 0.0f && mJumpState != JumpState_InAir)
         {
             // Started a jump.
-            float z = cls.getJump(mPtr);
             if (z > 0)
             {
                 if(vec.x() == 0 && vec.y() == 0)