https://bugs.gentoo.org/739110
--- a/DxLib.cpp
+++ b/DxLib.cpp
@@ -213,7 +213,7 @@ void ChangeFontType(byte type)
 
 void DrawString(int a, int b, const char *x, Uint32 c)
 {
-    SDL_Color color = { c >> 16, c >> 8, c };
+    SDL_Color color = { static_cast<unsigned char>(c >> 16), static_cast<unsigned char>(c >> 8), static_cast<unsigned char>(c) };
     SDL_Surface *rendered = TTF_RenderUTF8_Solid(font[fontsize], x, color);
     if (fontType == DX_FONTTYPE_EDGE) {
 	SDL_Color blk = { 0, 0, 0 };
-- 
2.51.1