Fix error string

Author: mrichardson23

Adafruit_I2C/Adafruit_I2C.py

@@ -56,7 +56,7 @@ def readList(self, reg, length):
         print results
       return results
     except IOError, err:
-      print "Error accessing 09x%02X: Check your I2C address" % self.address
+      print "Error accessing 0x%02X: Check your I2C address" % self.address
       return -1
 
   def readU8(self, reg):