Correct fixed path length

[mwetter]

The folder name is fixed in mkdir_p.c:

int mkdir_p(const char *path)
{
    /* Adapted from http://stackoverflow.com/a/2336245/119527 */
    const size_t len = strlen(path);
    char _path[PATH_MAX];
    char *p; 

Also, PATH_MAX is defined as

#ifndef PATH_MAX
#define PATH_MAX MAX_PATH
#endif

but MAX_PATH seems not be defined (and why is another constant needed?).

This code should be changed to dynamically allocate storage.

[JayHuLBL]

@mwetter I just talked with Antoine yesterday about some potential issues like that. I will go through the C code again to avoid the recently realized issues.

[AntoineGautier]

@JayHuLBL What is the status of this issue?
(We are about to release the newversion of buildingspy with funnel as the default comparison tool: I am checking the remaining open issues...)