libloc_api: fix format for debug output

Change-Id: I74e081297ac2c6601be915e517230d0a52a75150
diff --git a/loc_api/libloc_api/loc_eng.cpp b/loc_api/libloc_api/loc_eng.cpp
index 4b2abc2..ec69172 100755
--- a/loc_api/libloc_api/loc_eng.cpp
+++ b/loc_api/libloc_api/loc_eng.cpp
@@ -1387,7 +1387,7 @@
 static void loc_eng_process_loc_event (rpc_loc_event_mask_type loc_event,
         rpc_loc_event_payload_u_type* loc_event_payload)
 {
-   LOC_LOGD("loc_eng_process_loc_event: %x\n", loc_event);
+   LOC_LOGD("loc_eng_process_loc_event: %llx\n", (unsigned long long)loc_event);
    // Parsed report
    if ( (loc_event & RPC_LOC_EVENT_PARSED_POSITION_REPORT) &&
          loc_eng_data.mute_session_state != LOC_MUTE_SESS_IN_SESSION)