Fixed issue with doubles not working. This will check the condition if
if it's considered an integer (getDigit() == 0) or a double and cast
appropriately. This can be tested with the new snippet in comment 23.

Change-Id: If92ee1ff14a4bd57e163826cce74489331205c0a
Signed-off-by: Ian Pun <ipun@redhat.com>