[412] Additional fix for operator precedence
An earlier fix to ensure multiplication always had the correct precedence failed to include the case of brackets as implied multiplication, as reported by the first part of ticket #412 (marked as already fixed).
Now fixed in this case. Tested with the example '6/2(1+2)' and other expressions.
(GitLab doesn't appear to display the change correctly - it should be PROCcalc_sum("×") )