fix HOTKEY_CAPTURE_BUTTON (#394)

capture button hotkey presses S1

(unless we're in PS4 mode and the toggle is on, in which case it presses
A2)

note that this hotkey does something even on the input modes that don't
actually have a capture functionality, for clarity's sake

src/gamepad.cpp

@@ -295,13 +295,18 @@ void Gamepad::processHotkeyIfNewAction(GamepadHotkey action)
 		case HOTKEY_DPAD_LEFT_ANALOG  : options.dpadMode = DPAD_MODE_LEFT_ANALOG; reqSave = true; break;
 		case HOTKEY_DPAD_RIGHT_ANALOG : options.dpadMode = DPAD_MODE_RIGHT_ANALOG; reqSave = true; break;
 		case HOTKEY_HOME_BUTTON       : state.buttons |= GAMEPAD_MASK_A1; break; // Press the Home button
-		case HOTKEY_CAPTURE_BUTTON    :
-			break;
 		case HOTKEY_SOCD_UP_PRIORITY  : options.socdMode = SOCD_MODE_UP_PRIORITY; reqSave = true; break;
 		case HOTKEY_SOCD_NEUTRAL      : options.socdMode = SOCD_MODE_NEUTRAL; reqSave = true; break;
 		case HOTKEY_SOCD_LAST_INPUT   : options.socdMode = SOCD_MODE_SECOND_INPUT_PRIORITY; reqSave = true; break;
 		case HOTKEY_SOCD_FIRST_INPUT  : options.socdMode = SOCD_MODE_FIRST_INPUT_PRIORITY;  reqSave = true;break;
 		case HOTKEY_SOCD_BYPASS       : options.socdMode = SOCD_MODE_BYPASS; reqSave = true; break;
+		case HOTKEY_CAPTURE_BUTTON    :
+			if (options.inputMode == INPUT_MODE_PS4 && options.switchTpShareForDs4) {
+				state.buttons |= GAMEPAD_MASK_A2;
+			} else {
+				state.buttons |= GAMEPAD_MASK_S1;
+			}
+			break;
 		case HOTKEY_INVERT_X_AXIS     :
 			if (action != lastAction) {
 				options.invertXAxis = !options.invertXAxis;