auc.c: typo in comment

Change-Id: I4652e932f1bdb7767b5394c09e7436812488aa74
diff --git a/src/auc.c b/src/auc.c
index 33d8eda..7d8597a 100644
--- a/src/auc.c
+++ b/src/auc.c
@@ -26,7 +26,7 @@
 #include "rand.h"
 
 /* compute given number of vectors using either aud2g or aud2g or a combination
- * of both.  Handles re-synchrnization if rand_auts and auts are set */
+ * of both.  Handles re-synchronization if rand_auts and auts are set */
 int auc_compute_vectors(struct osmo_auth_vector *vec, unsigned int num_vec,
 			struct osmo_sub_auth_data *aud2g,
 			struct osmo_sub_auth_data *aud3g,