How to change this font pic in the civics screen?

[yorkgrass]

Spoiler :

<BuildingHappinessChanges>
<BuildingHappinessChange>
<BuildingType>BUILDINGCLASS_TOWN_HALL</BuildingType>
<iHappinessChange>-1</iHappinessChange>
</BuildingHappinessChange>
</BuildingHappinessChanges>

As shown above, the -1 Angry face is not what the xml intended to show, it should be either -1 Smile face or +1 Angry face. The game played correctly, but the display is wrong, is there any way I can change it? like the health/ill font display?

Any help would be appreciated?

 

[yorkgrass]

OK I found this in the gametextinfo.xml:
%D1_Change%F2_HappyOrUn
It will not auto change the minus sign as %D1_Change%F2_HealthOrUn ? is it possible to correct this bug?

it looks like that is bind to specific tag, as %D1 is always positive for city extra health, but not for happiness.

Please help Thanks!