fix query behaviour when limit is present (reported by @Mazin)

src/misc.cpp

@@ -103,3 +103,9 @@ uint64_t getDBVersion(lmdb::txn &txn) {
 
     return dbVersion;
 }
+
+
+std::string padBytes(std::string_view str, size_t n, char padChar) {
+    if (str.size() > n) throw herr("unable to pad, string longer than expected");
+    return std::string(str) + std::string(n - str.size(), padChar);
+}