Update Adafruit_CharLCD/Adafruit_CharLCD.py

In delayMicroseconds(), sleep(seconds) always equals 0 (get a lot of weird characters on LCD)

in python v2 microseconds / 1000000 = 0
changed to : microseconds / float(1000000)

so sleep(seconds) doesn't always equal 0 (get a lot of weird characters on LCD otherwise)

Author: rogg

Adafruit_CharLCD/Adafruit_CharLCD.py

@@ -229,7 +229,7 @@ def write4bits(self, bits, char_mode=False):
 
 
     def delayMicroseconds(self, microseconds):
-	seconds = microseconds / 1000000	# divide microseconds by 1 million for seconds
+	seconds = microseconds / float(1000000)	# divide microseconds by 1 million for seconds
 	sleep(seconds)