- added alternative character mapping for Greek letters.

Although not really needed yet, this allows striking 19 characters off the support list, except for the Raven fonts without any real work.

src/gamedata/fonts/v_font.cpp

@@ -895,9 +895,76 @@ int getAlternative(int code)
 		case 0x21b:
 			return 0x163;
 
+			// Greek characters with equivalents in either Latin or Cyrillic. This is only suitable for uppercase fonts!
+		case 0x391:
+			return 'A';
+
+		case 0x392:
+			return 'B';
+
+		case 0x393:
+			return 0x413;
+
+		case 0x395:
+			return 'E';
+
+		case 0x396:
+			return 'Z';
+
+		case 0x397:
+			return 'H';
+
+		case 0x399:
+			return 'I';
+
+		case 0x39a:
+			return 'K';
+
+		case 0x39c:
+			return 'M';
+
+		case 0x39d:
+			return 'N';
+	
+		case 0x39f:
+			return 'O';
+
+		case 0x3a0:
+			return 0x41f;
+
+		case 0x3a1:
+			return 'P';
+
+		case 0x3a4:
+			return 'T';
+
+		case 0x3a5:
+			return 'Y';
+
+		case 0x3a6:
+			return 0x424;
+
+		case 0x3a7:
+			return 'X';
+
+		case 0x3aa:
+			return 0xcf;
+
+		case 0x3ab:
+			return 0x178;
+
+		case 0x3bf:
+			return 'o';
+
 		case 0x3c2:
 			return 0x3c3;	// Lowercase Sigma character in Greek, which changes depending on its positioning in a word; if the font is uppercase only or features a smallcaps style, the second variant of the letter will remain unused
 
+		case 0x3ca:
+			return 0xef;
+
+		case 0x3cc:
+			return 0xf3;
+
 			// Cyrillic characters with equivalents in the Latin alphabet.
 		case 0x400:
 			return 0xc8;