Raise on negative integer input

[id-ilych]

Passing negative integer input causes infinite loop as number will always be negative and never gets to zero

BaseCustom/lib/basecustom.rb

Lines 49 to 54 in 018e081

	number = input_val
	result = ""
	while(number != 0)
	result = @BASE_PRIMITIVES_ARRAY[number % @BASE_PRIMITIVES_ARRAY.size ].to_s + @delim + result
	number = Integer(number/@BASE_PRIMITIVES_ARRAY.size)
	end

With that it's better to raise right away. Since other cases also raise RuntimeError I used it instead of ArgumentError for the sake of consistency.

[semanticdiff-com]

Review changes with