#64 Segfault on diff() with no "*radian"

[TheDarkFreeSoul]

Just found that Qalculate! segfaults when trying to calculate:
diff((x-tan(x))/(x^2*sin(x)))

I also tryed: diff((x-tan(x))/(x^2*sin(x)),x,1) but it sefgaults again.

If we try the same function adding "* radian" inside trigonometric function it works right:
diff((x-tan(x*radian))/(x^2*sin(x*radian)),x,1)

This works too:
diff((x-tan(x*radian))/(x^2*sin(x)),x,1)

Many thanks,

TDFS

[Jonathan Stickel]

Still broken in 0.9.7.