fix msvc problems

src/Gui/ViewProvider.cpp

@@ -474,3 +474,29 @@ std::vector<Base::Vector3d> ViewProvider::getModelPoints(const SoPickedPoint* pp
     pts.push_back(Base::Vector3d(vec[0],vec[1],vec[2]));
     return pts;
 }
+
+bool ViewProvider::keyPressed(bool pressed, int key)
+{
+    (void)pressed;
+    (void)key;
+    return false;
+}
+
+bool ViewProvider::mouseMove(const SbVec2s &cursorPos,
+                             View3DInventorViewer* viewer)
+{
+    (void)cursorPos;
+    (void)viewer;
+    return false;
+}
+
+bool ViewProvider::mouseButtonPressed(int button, bool pressed,
+                                      const SbVec2s &cursorPos,
+                                      const View3DInventorViewer* viewer)
+{
+    (void)button;
+    (void)pressed;
+    (void)cursorPos;
+    (void)viewer;
+    return false;
+}