[Client] Prevent framerate drops caused by invalid rotation values

apps/openmw/mwmp/DedicatedActor.cpp

@@ -104,9 +104,14 @@ void DedicatedActor::setMovementSettings()
     move->mPosition[0] = direction.pos[0];
     move->mPosition[1] = direction.pos[1];
     move->mPosition[2] = direction.pos[2];
-    move->mRotation[0] = direction.rot[0];
-    move->mRotation[1] = direction.rot[1];
-    move->mRotation[2] = direction.rot[2];
+
+    // Make sure the values are valid, or we'll get an infinite error loop
+    if (!isnan(direction.rot[0]) && !isnan(direction.rot[1]) && !isnan(direction.rot[2]))
+    {
+        move->mRotation[0] = direction.rot[0];
+        move->mRotation[1] = direction.rot[1];
+        move->mRotation[2] = direction.rot[2];
+    }
 }
 
 void DedicatedActor::setPosition()

apps/openmw/mwmp/DedicatedPlayer.cpp

@@ -123,10 +123,14 @@ void DedicatedPlayer::move(float dt)
     move->mPosition[0] = direction.pos[0];
     move->mPosition[1] = direction.pos[1];
     move->mPosition[2] = direction.pos[2];
-    move->mRotation[0] = direction.rot[0];
-    move->mRotation[1] = direction.rot[1];
-    move->mRotation[2] = direction.rot[2];
-
+    
+    // Make sure the values are valid, or we'll get an infinite error loop
+    if (!isnan(direction.rot[0]) && !isnan(direction.rot[1]) && !isnan(direction.rot[2]))
+    {
+        move->mRotation[0] = direction.rot[0];
+        move->mRotation[1] = direction.rot[1];
+        move->mRotation[2] = direction.rot[2];
+    }
 }
 
 void DedicatedPlayer::setAnimFlags()