DisplayBuffer sourceRange crash and createPath method

[ustk]

@Christoph-Hart

• sourceRange S[2] doesn't seem to do anything while S[3] modification makes Hise freeze and crash. Since these values are indexes, what is the maximum (aside of -1)?

• It seems weird to me to create a path at each timer iteration. Shouldn't it be created once and then have a method to get updated data? Or I might just have a timorous state of mind on this :)

[ustk]

Bumpy bump