[navaraf] 20139: Add check for VbeModeInfo->PhysBasePtr != 0.

Add check for VbeModeInfo->PhysBasePtr != 0.
Modified: trunk/reactos/drivers/video/miniport/vbe/vbemp.c
  _____  

Modified: trunk/reactos/drivers/video/miniport/vbe/vbemp.c
--- trunk/reactos/drivers/video/miniport/vbe/vbemp.c	2005-12-13
00:02:07 UTC (rev 20138)
+++ trunk/reactos/drivers/video/miniport/vbe/vbemp.c	2005-12-13
00:17:08 UTC (rev 20139)
@@ -344,7 +344,8 @@

           VbeModeInfo->XResolution >= 640 &&
           VbeModeInfo->YResolution >= 480 &&
           (VbeModeInfo->MemoryModel == VBE_MEMORYMODEL_PACKEDPIXEL ||
-           VbeModeInfo->MemoryModel == VBE_MEMORYMODEL_DIRECTCOLOR))
+           VbeModeInfo->MemoryModel == VBE_MEMORYMODEL_DIRECTCOLOR) &&
+          VbeModeInfo->PhysBasePtr != 0)
       {
          if (VbeModeInfo->ModeAttributes & VBE_MODEATTR_LINEAR)
          {