In LiquidCrystal::setCursor(), check against length of _row_offsets as well

Before, the row value was maximized against _numlines already, but the
value from _numlines is not limited anywhere, so it could be longer than
the length of _row_offsets. This check makes sure the array bounds is
never exceeded.

Author: matthijskooijman

libraries/LiquidCrystal/src/LiquidCrystal.cpp

@@ -182,6 +182,10 @@ void LiquidCrystal::home()
 
 void LiquidCrystal::setCursor(uint8_t col, uint8_t row)
 {
+  const size_t max_lines = sizeof(_row_offsets) / sizeof(*_row_offsets);
+  if ( row >= max_lines ) {
+    row = max_lines - 1;    // we count rows starting w/0
+  }
   if ( row >= _numlines ) {
     row = _numlines - 1;    // we count rows starting w/0
   }