Fix bool / int mismatch for win64

See https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_compile_dbg_ng/builds/286646/steps/compile%20%28with%20patch%29/logs/stdio

Review-Url: https://codereview.chromium.org/2463963002
diff --git a/core/fxge/win32/fx_win32_print.cpp b/core/fxge/win32/fx_win32_print.cpp
index 6d00d83..ab12a92 100644
--- a/core/fxge/win32/fx_win32_print.cpp
+++ b/core/fxge/win32/fx_win32_print.cpp
@@ -320,8 +320,8 @@
 
   // Try to get the font and draw again.
   g_pdfium_typeface_accessible_func(&lf, wsText.c_str(), nChars);
-  return ExtTextOutW(m_hDC, 0, 0, ETO_GLYPH_INDEX, nullptr, wsText.c_str(),
-                     nChars, nChars > 1 ? &spacing[1] : nullptr);
+  return !!ExtTextOutW(m_hDC, 0, 0, ETO_GLYPH_INDEX, nullptr, wsText.c_str(),
+                       nChars, nChars > 1 ? &spacing[1] : nullptr);
 #else
   return FALSE;
 #endif