Fix warning

src/edge.c

@@ -78,6 +78,7 @@ node * r3_edge_branch(edge *e, int dl) {
     e->pattern = strndup(e->pattern, dl);
     e->pattern_len = dl;
     free(op);
+    return new_child;
 }
 
 void r3_edge_free(edge * e) {

tests/bench_str.csv

@@ -313,3 +313,5 @@
 1400414501,10750962.96
 1400414556,11007510.49
 1400414587,10903071.42
+1400415353,10705889.14
+1400415397,11505319.20