(I'm the upstream gcc author of -Wmisleading-indentation) Looking at, https://github.com/troglobit/libite/blob/master/lite.h#L134 the code in question seems to be:
static inline int fisslashdir(char *dir) { if (!dir) return 0; if (strlen (dir) > 0) return dir[strlen (dir) - 1] == '/'; return 0; }