add some return values to some shit so it shuts down elegantly on crash

include/LCDDisplay.hpp

@@ -11,11 +11,12 @@
 class LCDDisplay {
    private:
     int _lcd = -1;
+    uint32_t _baud = 0;
     std::string _dev;
     std::array<char, LCD_LINES * LCD_COLS + 8> writebuf{};         // 4x40 chars + 2x4 setcursor commands
     static constexpr bool dualDisp = (LCD_LINES * LCD_COLS > 80);  // is it dual display device or not, evauluated from the size at compile time
 
-    void open(bool reopen = false);
+    int open(bool reopen = false);
     void write(const uint8_t* cmdbuf, uint8_t len);
     void close();
 
@@ -27,6 +28,7 @@ class LCDDisplay {
     explicit LCDDisplay(const std::string& dev, uint32_t baud = 0010002);  // from termios-baud.h, B115200
     ~LCDDisplay();
 
+    int Init();
     void clear();
     void setContrast(uint8_t contrast);
     void setBacklight(bool enabled);