Use lround instead of llround, since it has better compatibility with older MingW and Cygwin versions

cgminer.c

@@ -5110,7 +5110,7 @@ static void hashmeter(int thr_id, struct timeval *diff,
 
 	local_secs = (double)total_diff.tv_sec + ((double)total_diff.tv_usec / 1000000.0);
 	decay_time(&total_rolling, local_mhashes_done / local_secs, local_secs);
-	global_hashrate = llround(total_rolling) * 1000000;
+	global_hashrate = ((unsigned long long)lround(total_rolling)) * 1000000;
 
 	timersub(&total_tv_end, &total_tv_start, &total_diff);
 	total_secs = (double)total_diff.tv_sec +