Add compatibility hack for English Daibanchou

Gpx2Plus.CopyStretchReduceAMap behaves differently in the English
version.

Fixes an issue with text being squashed horizontally on the regional
phase menus.

include/xsystem4.h

@@ -63,6 +63,7 @@ void get_time(int *hour, int *min, int *sec, int *ms);
 #define XSYS4_DATA_DIR "/usr/local/share/xsystem4"
 #endif
 
+extern bool game_daibanchou_en;
 extern bool game_rance02_mg;
 
 #endif /* XSYSTEM4_H */

src/hacks.c

@@ -23,12 +23,14 @@
 #include "system4/buffer.h"
 #include "system4/instructions.h"
 #include "system4/string.h"
+#include "system4/utfsjis.h"
 
 #include "gfx/gfx.h"
 #include "xsystem4.h"
 
 #include "hll/hll.h"
 
+bool game_daibanchou_en = false;
 bool game_rance02_mg = false;
 
 static void write_instruction0(struct buffer *out, enum opcode op)
@@ -105,9 +107,25 @@ static void apply_rance02_hacks(struct ain *ain)
 	game_rance02_mg = true;
 }
 
-void apply_game_specific_hacks(struct ain *ain)
+// Daibanchou (English fan translation)
+// ------------------------------------
+// Gpx2Plus.CopyStretchReduceAMap behaves differently in order to work around
+// text rendering issues caused by how the game calculates text width in
+// StructRegionalSelect::DrawMenuItem.
+static void apply_daibanchou_hacks(struct ain *ain)
 {
-	if (!strcmp(config.game_name, "Rance 02")) {
-		apply_rance02_hacks(ain);
+	if (ain->nr_strings > 2 && !strcmp(ain->strings[2]->text, "Seijou Academy")) {
+		game_daibanchou_en = true;
 	}
 }
+
+void apply_game_specific_hacks(struct ain *ain)
+{
+	char *game_name = sjis2utf(config.game_name, 0);
+	if (!strcmp(game_name, "大番長")) {
+		apply_daibanchou_hacks(ain);
+	} else if (!strcmp(game_name, "Rance 02")) {
+		apply_rance02_hacks(ain);
+	}
+	free(game_name);
+}

src/hll/Gpx2Plus.c

@@ -353,6 +353,8 @@ static void Gpx2Plus_CopyStretchReduce(int destSurface, int dx, int dy, int dWid
 
 static void Gpx2Plus_CopyStretchReduceAMap(int destSurface, int dx, int dy, int dWidth, int dHeight, int srcSurface, int sx, int sy, int sWidth, int sHeight)
 {
+	if (game_daibanchou_en)
+		sWidth /= 2;
 	struct texture *dst = get_texture(destSurface);
 	struct texture *src = get_texture(srcSurface);
 	if (!dst || !src)