Disable some more DLL build related warnings.

Source/Engine/Revision.cpp

@@ -26,7 +26,8 @@
 namespace Urho3D
 {
 
-const char* GetRevision() {
+const char* GetRevision()
+{
     return revision;
 }
 

Source/Engine/Urho3D.h.in

@@ -22,4 +22,5 @@
 
 #ifdef _MSC_VER
 #pragma warning(disable: 4251)
+#pragma warning(disable: 4275)
 #endif