Fix integer overflow when stretching bitmap for printing

core/src/fxge/win32/fx_win32_device.cpp

Index: core/src/fxge/win32/fx_win32_device.cpp
diff --git a/core/src/fxge/win32/fx_win32_device.cpp b/core/src/fxge/win32/fx_win32_device.cpp
index 154bbc407c873b132e1f52064ce55d463131978c..e19cb755603b4567b0f5d0b7065f1b2b34bac839 100644
--- a/core/src/fxge/win32/fx_win32_device.cpp
+++ b/core/src/fxge/win32/fx_win32_device.cpp
@@ -531,7 +531,7 @@ FX_BOOL CGdiDeviceDriver::GDI_StretchDIBits(const CFX_DIBitmap* pBitmap1, int de
     }
     CFX_DIBitmap* pToStrechBitmap = pBitmap;
     bool del = false;
-    if (m_DeviceClass == FXDC_PRINTER && (pBitmap->GetWidth() * pBitmap->GetHeight() > abs(dest_width) * abs(dest_height))) {
+    if (m_DeviceClass == FXDC_PRINTER && ((long long)pBitmap->GetWidth() * pBitmap->GetHeight() > (long long)abs(dest_width) * abs(dest_height))) {

[Vitaly Buka (NO REVIEWS), 2014/07/31 00:00:06]

looks like FX_INT64 is more consistent here

[Bo Xu, 2014/07/31 16:51:10]

That's right.

         pToStrechBitmap = pBitmap->StretchTo(dest_width, dest_height);
         del = true;
     }