Try basic type conversion before calling num2words for safety

[nonprofittechy]

This modifies the number_to_word function so that it attempts basic type conversion of the number value into an integer, which is required by num2words package. If the type conversion fails, the current raise_on_error parameter is still respected.

Currently, this error occurs when passing an undefined value to ordinal_number in the DOCX/Jinja2 context.

[jhpyle]

Thanks. I didn't make this change but I did something else that I think will have the same effect while still permitting the function to be called with a float.