(svn r822) Use a struct instead of pairs of bytes for the string colormap.

While here give the string colormap a more canonical name.

gfx.c

@@ -487,8 +487,8 @@ int DoDrawString(const byte *string, int x, int y, byte color) {
 
 		if (color != 0xFF) {
 switch_color:;
-			_string_colorremap[1] = StringColormap[color][0];
+			_string_colorremap[1] = _string_colormap[color].text;
-			_string_colorremap[2] = StringColormap[color][1];
+			_string_colorremap[2] = _string_colormap[color].shadow;
 			_color_remap_ptr = _string_colorremap;
 		}
 	}

table/palettes.h

@@ -95,9 +95,12 @@ static const ExtraPaletteValues _extra_palette_values = {
 };
 
 // Color table for colors in lang files (e.g. {BLACK})
-// 1st color: text
+typedef struct StringColor {
-// 2nd color: shadow
+	byte text;
-static const byte StringColormap[17][2] = {
+	byte shadow;
+} StringColor;
+
+static const StringColor _string_colormap[] = {
 	{ 150, 215 }, // BLUE
 	{  12, 215 }, // SILVER
 	{ 189, 215 }, // GOLD