compilation warning: hat-trie, taking absolute value of unsigned type
libknot/internal/trie/hat-trie.c:503:18: warning: taking the absolute value of unsigned type 'unsigned int' has no effect [-Wabsolute-value]
if (d <= abs(*left_m - *right_m) && *left_m + cs[j + 1] < all_m) {
^
clang 3.4