Some expression maths not working in IE11

[ashleyclough]

Version: 0.49.0
Internet Explorer 11

Some (complex) maths in expressions used to calculate circle-radius are failing in IE11 - circles appear small and fixed with no variation. Same code renders correctly in other browsers.

Both these fail:

"circle-radius": [
      "+",["*",["log2",["get", "point_count"]],12],10
]

Console reports: Object doesn't support property or method 'log2'

"circle-radius": [
       "+",["*",["sqrt",["get", "point_count"]],6],20
]

Have reverted to unsophisticated 'property' and 'stops' sizing from pre-expression days.

[mourner]

Good catch — submitted a fix in #7320.