Use SDL_WINDOWPOS_UNDEFINED as the default window position to simplify code.

Source/Engine/Graphics/Direct3D9/D3D9Graphics.cpp

@@ -251,7 +251,7 @@ Graphics::Graphics(Context* context) :
     externalWindow_(0),
     width_(0),
     height_(0),
-    position_(M_MAX_INT,M_MAX_INT),
+    position_(SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED),
     multiSample_(1),
     fullscreen_(false),
     borderless_(false),
@@ -2477,10 +2477,7 @@ bool Graphics::OpenWindow(int width, int height, bool resizable, bool borderless
         if (borderless)
             flags |= SDL_WINDOW_BORDERLESS;
 
-        impl_->window_ = SDL_CreateWindow(windowTitle_.CString(),
-             (position_.x_ != M_MAX_INT ? position_.x_ : SDL_WINDOWPOS_UNDEFINED), (position_.y_ != M_MAX_INT ? position_.y_ : SDL_WINDOWPOS_UNDEFINED),
-             width, height, flags
-        );
+        impl_->window_ = SDL_CreateWindow(windowTitle_.CString(), position_.x_, position_.y_, width, height, flags);
     }
     else
         impl_->window_ = SDL_CreateWindowFrom(externalWindow_, 0);

Source/Engine/Graphics/OpenGL/OGLGraphics.cpp

@@ -222,7 +222,7 @@ Graphics::Graphics(Context* context_) :
     externalWindow_(0),
     width_(0),
     height_(0),
-    position_(M_MAX_INT,M_MAX_INT),
+    position_(SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED),
     multiSample_(1),
     fullscreen_(false),
     borderless_(false),
@@ -423,10 +423,8 @@ bool Graphics::SetMode(int width, int height, bool fullscreen, bool borderless,
             SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 0);
         }
         
-        int x = fullscreen ? 0 : position_.x_ != M_MAX_INT ?
-            position_.x_ : SDL_WINDOWPOS_UNDEFINED;
-        int y = fullscreen ? 0 : position_.y_ != M_MAX_INT ?
-            position_.y_ : SDL_WINDOWPOS_UNDEFINED;
+        int x = fullscreen ? 0 : position_.x_;
+        int y = fullscreen ? 0 : position_.y_;
 
         unsigned flags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN;
         if (fullscreen)