Fixed black screen after the computer was locked.

zsnes/src/win/winlink.cpp

@@ -342,7 +342,6 @@ void DDrawError(){
 extern "C" BYTE vsyncon;
 extern "C" BYTE KitchenSync;
 extern "C" BYTE TripleBufferWin;
-extern "C" BYTE EMUPaused;
 extern "C" BYTE PauseFocusChange;
 
 void DrawScreen()
@@ -1698,7 +1697,9 @@ DWORD LockSurface()
       else
       {
         if (hRes == DDERR_SURFACELOST)
+          DD_Primary->Restore();
           DD_CFB->Restore();
+          Clear2xSaIBuffer();
         return(0);
       }
     }
@@ -1723,7 +1724,9 @@ DWORD LockSurface()
       else
       {
         if (hRes == DDERR_SURFACELOST)
+          DD_Primary->Restore();
           DD_CFB16->Restore();
+          Clear2xSaIBuffer();
         return(0);
       }
     }