Added necessary include files to not rely on includes in Precompiled.h.

Source/Engine/Core/Mutex.h

@@ -22,6 +22,8 @@
 
 #pragma once
 
+#include "Urho3D.h"
+
 namespace Urho3D
 {
 

Source/Engine/Graphics/Tangent.h

@@ -22,6 +22,8 @@
 
 #pragma once
 
+#include "Urho3D.h"
+
 namespace Urho3D
 {
 

Source/Engine/Navigation/NavigationMesh.h

@@ -25,6 +25,7 @@
 #include "ArrayPtr.h"
 #include "BoundingBox.h"
 #include "Component.h"
+#include "HashSet.h"
 #include "Matrix3x4.h"
 
 class dtNavMesh;

Source/Engine/Script/Addons.h

@@ -24,6 +24,7 @@
 
 #include "Urho3D.h"
 #include "HashMap.h"
+#include "Str.h"
 
 #include <angelscript.h>