avoid unused variable warning:

‘OUTPUT_DRAWMODE_CONTRAST’ defined but not used [-Wunused-variable]
with GCC 5.1.1

Change-Id: I98c7b8f1ff52c7efd81d1490f848092da6173df8
Reviewed-on: https://gerrit.libreoffice.org/18826Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>

include/svx/dlgutil.hxx

@@ -33,8 +33,8 @@ SVX_DLLPUBLIC FieldUnit GetModuleFieldUnit( const SfxItemSet& );
 SVX_DLLPUBLIC FieldUnit GetModuleFieldUnit();
 SVX_DLLPUBLIC bool GetApplyCharUnit( const SfxItemSet& );
 
-static const DrawModeFlags OUTPUT_DRAWMODE_COLOR  = DrawModeFlags::Default;
-static const DrawModeFlags OUTPUT_DRAWMODE_CONTRAST = DrawModeFlags::SettingsLine | DrawModeFlags::SettingsFill | DrawModeFlags::SettingsText | DrawModeFlags::SettingsGradient;
+#define OUTPUT_DRAWMODE_COLOR    DrawModeFlags::Default
+#define OUTPUT_DRAWMODE_CONTRAST (DrawModeFlags::SettingsLine | DrawModeFlags::SettingsFill | DrawModeFlags::SettingsText | DrawModeFlags::SettingsGradient)
 
 #endif