nstat: fix load_ugly_table() limits

index 88f1c7698243235b12f58cd067afce488af1be4c..653580eae0603327ea654510ae1f23a79578c1fe 100644
@@ -177,11 +177,13 @@ static int count_spaces(const char *line)
 
 static void load_ugly_table(FILE *fp)
 {
-	char buf[2048];
+	char *buf = NULL;
+	size_t buflen = 0;
+	ssize_t nread;
 	struct nstat_ent *db = NULL;
 	struct nstat_ent *n;
 
-	while (fgets(buf, sizeof(buf), fp) != NULL) {
+	while ((nread = getline(&buf, &buflen, fp)) != -1) {
 		char idbuf[4096];
 		int  off;
 		char *p;

@@ -218,7 +220,8 @@ static void load_ugly_table(FILE *fp)
 			p = next;
 		}
 		n = db;
-		if (fgets(buf, sizeof(buf), fp) == NULL)
+		nread = getline(&buf, &buflen, fp);
+		if (nread == -1)
 			abort();
 		count2 = count_spaces(buf);
 		if (count2 > count1)

@@ -237,6 +240,7 @@ static void load_ugly_table(FILE *fp)
 				n = n->next;
 		} while (p > buf + off + 2);
 	}
+	free(buf);
 
 	while (db) {
 		n = db;