Sanity check the values of TRUE and FALSE.

core/include/fxge/fx_dib.h

Index: core/include/fxge/fx_dib.h
diff --git a/core/include/fxge/fx_dib.h b/core/include/fxge/fx_dib.h
index 818aaac5209adbd867aee6ca91b5cc81bd1ccd33..e22ab58065743b7f331347f47a83c6df7ff1ddee 100644
--- a/core/include/fxge/fx_dib.h
+++ b/core/include/fxge/fx_dib.h
@@ -196,13 +196,16 @@ class CFX_DIBSource {
 
   int GetBPP() const { return m_bpp; }
 
+  // TODO(thestig): Investigate this. Given the possible values of FXDIB_Format,
+  // it feels as though this should be implemented as !!(m_AlphaFlag & 1) and
+  // IsOpaqueImage() below should never be able to return TRUE.
   FX_BOOL IsAlphaMask() const { return m_AlphaFlag == 1; }
 
-  FX_BOOL HasAlpha() const { return m_AlphaFlag & 2 ? TRUE : FALSE; }
+  FX_BOOL HasAlpha() const { return !!(m_AlphaFlag & 2); }
 
   FX_BOOL IsOpaqueImage() const { return !(m_AlphaFlag & 3); }
 
-  FX_BOOL IsCmykImage() const { return m_AlphaFlag & 4 ? TRUE : FALSE; }
+  FX_BOOL IsCmykImage() const { return !!(m_AlphaFlag & 4); }
 
   int GetPaletteSize() const {
     return IsAlphaMask() ? 0 : (m_bpp == 1 ? 2 : (m_bpp == 8 ? 256 : 0));