Ignore the alpha value in font colors.

Using it would remove the color altogether.

Change-Id: I2c14316c9c9c885f4e7615e4057e752a58223227
Reviewed-on: https://gerrit.libreoffice.org/49170Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Kohei Yoshida <libreoffice@kohei.us>

sc/source/filter/orcus/interface.cxx

@@ -1485,12 +1485,13 @@ void ScOrcusStyles::set_font_underline_color(orcus::spreadsheet::color_elem_t al
     maCurrentFont.maUnderlineColor = Color(alpha, red, green, blue);
 }
 
-void ScOrcusStyles::set_font_color(orcus::spreadsheet::color_elem_t alpha,
+void ScOrcusStyles::set_font_color(orcus::spreadsheet::color_elem_t /*alpha*/,
             orcus::spreadsheet::color_elem_t red,
             orcus::spreadsheet::color_elem_t green,
             orcus::spreadsheet::color_elem_t blue)
 {
-    maCurrentFont.maColor = Color(alpha, red, green, blue);
+    // Ignore the alpha value for now.
+    maCurrentFont.maColor = Color(red, green, blue);
     maCurrentFont.mbHasFontAttr = true;
 }