Ports: Ability to crop SGB borders off screen (closes #1204)

CHANGES

@@ -14,6 +14,7 @@ Features:
  - Frame inspector for dissecting and debugging rendering
  - Switch: Option to use built-in brightness sensor for Boktai
  - Ports: Ability to enable or disable all SGB features (closes mgba.io/i/1205)
+ - Ports: Ability to crop SGB borders off screen (closes mgba.io/i/1204)
 Emulation fixes:
  - GBA: All IRQs have 7 cycle delay (fixes mgba.io/i/539, mgba.io/i/1208)
  - GBA: Reset now reloads multiboot ROMs

src/feature/gui/gui-config.c

@@ -142,6 +142,16 @@ void mGUIShowConfig(struct mGUIRunner* runner, struct GUIMenuItem* extra, size_t
 		},
 		.nStates = 2
 	};
+	*GUIMenuItemListAppend(&menu.items) = (struct GUIMenuItem) {
+		.title = "Crop SGB borders",
+		.data = "sgb.borderCrop",
+		.submenu = 0,
+		.state = false,
+		.validStates = (const char*[]) {
+			"Off", "On"
+		},
+		.nStates = 2
+	};
 #endif
 	size_t i;
 	const char* mapNames[GUI_MAX_INPUTS + 1];