[D3D] Some misc. fixes

[Lionel Ulmer <lionel.ulmer@free.fr>]

Changelog:
 - protect viewport setting with GL lock
 - no need anymore to flush to FB on execute buffer calling

-- 
		 Lionel Ulmer - http://www.bbrox.org/

--- dlls/ddraw_CVS/d3ddevice/mesa.c	Mon May 26 11:07:28 2003
+++ dlls/ddraw/d3ddevice/mesa.c	Mon May 26 13:26:00 2003
@@ -2205,11 +2205,15 @@
     }
     This->active_viewport = *lpData;
 
+    ENTER_GL();
+    
     /* Set the viewport */
     glDepthRange(lpData->dvMinZ, lpData->dvMaxZ);
     glViewport(lpData->dwX,
 	       This->surface->surface_desc.dwHeight - (lpData->dwHeight + lpData->dwY),
 	       lpData->dwWidth, lpData->dwHeight);
+
+    LEAVE_GL();
     
     return DD_OK;
 }
--- dlls/ddraw_CVS/d3dexecutebuffer.c	Wed May 21 22:42:32 2003
+++ dlls/ddraw/d3dexecutebuffer.c	Mon May 26 13:37:27 2003
@@ -74,11 +74,6 @@
     if (TRACE_ON(ddraw))
       _dump_executedata(&(This->data));
 
-    if (((IDirect3DDeviceGLImpl *) lpDevice)->state == SURFACE_MEMORY_DIRTY) {
-        lpDevice->flush_to_framebuffer(lpDevice, NULL, ((IDirect3DDeviceGLImpl *) lpDevice)->lock_surf);
-    }
-    ((IDirect3DDeviceGLImpl *) lpDevice)->state = SURFACE_GL;
-    
     while (1) {
         LPD3DINSTRUCTION current = (LPD3DINSTRUCTION) instr;
 	BYTE size;