Fixed bit order reversal in drawBitmap()

Adafruit_GFX.cpp

@@ -339,7 +339,7 @@ void Adafruit_GFX::drawBitmap(int16_t x, int16_t y,
 
   for(j=0; j<h; j++) {
     for(i=0; i<w; i++ ) {
-      if(pgm_read_byte(bitmap + j * byteWidth + i / 8) & _BV(i & 7)) {
+      if(pgm_read_byte(bitmap + j * byteWidth + i / 8) & (128 >> (i & 7))) {
 	drawPixel(x+i, y+j, color);
       }
     }