missing parameter in csv#CalculateColumnWidth() call

[Pierrick Roger]

When loading a tsv file I get the following error:

Error detected while processing function csv#Init:
line   84:
E119: Not enough arguments for function: csv#CalculateColumnWidth
line   86:
E121: Undefined variable: b:col_width
E116: Invalid arguments for function join(b:col_width, ',')

The TSV file is:

abc	def	ghi
1	2	a
3	4	b
5	6	c

It seems the function csv#CalculateColumnWidth() takes two arguments (second is silent) and is called with only one. I'll make a modification and propose a pull request.

[Pierrick Roger]

Duplicate of #152