Fix #7616: Use unicode dingbats for +/- buttons in CJK languages.

src/openrct2/drawing/Font.cpp

@@ -112,6 +112,9 @@ sint32 font_sprite_get_codepoint_offset(sint32 codepoint)
     case UNICODE_Z_DOT: return RCT2_Z_DOT - 32;
     case UNICODE_Z_ACUTE: return RCT2_Z_ACUTE - 32;
 
+    case UNICODE_DINGBATS_PLUS: return 11;
+    case UNICODE_DINGBATS_MINUS: return 13;
+
     default:
         if (codepoint < 32 || codepoint >= 256) codepoint = '?';
         return codepoint - 32;

src/openrct2/localisation/FormatCodes.cpp

@@ -137,6 +137,8 @@ bool utf8_should_use_sprite_for_codepoint(sint32 codepoint)
     case FORMAT_LEFT:
     case FORMAT_OPENQUOTES:
     case FORMAT_ENDQUOTES:
+    case UNICODE_DINGBATS_PLUS:
+    case UNICODE_DINGBATS_MINUS:
         return true;
     default:
         return false;

src/openrct2/localisation/FormatCodes.h

@@ -181,4 +181,10 @@ enum UnicodePolish
     UNICODE_Z_ACUTE = 378,
 };
 
+enum UnicodeDingbats
+{
+    UNICODE_DINGBATS_PLUS = 0x2795,
+    UNICODE_DINGBATS_MINUS = 0x2796,
+};
+
 #endif