Omegascript setrelevant should set minargs to be 1 instead of 0

[Gaurav Arora]

setrelevant set the minargs to be 0

T(setrelevant,	   0, 1, N, Q), // set rset

But assumes it has one argument

	    case CMD_setrelevant: {
		string::size_type i = 0, j;
		while (true) {
		    j = args[0].find_first_not_of("0123456789", i);

It gets a segmentation fault when we add $setrelevant to the template instead of throwing an error message about min-argument.

Its an easy fix so probably can be directly done in repo instead of the pull request. Happy to open a pull request if it would be helpful.

[Olly Betts]

Fixed on git master with a regression test by 98ccd785be01bb5c7c54807ed0ad117ff63907ef. This seems to also affect 1.4.x (from the code - not tested as such).

[Olly Betts]

Backported on 2020-01-04 as f6e81d52d9ce4cc09077195a3fb96f3f642792e1.