valhalla: fix build with protobuf 3.18+

pkgs/development/libraries/valhalla/default.nix

···
     fetchSubmodules = true;
   };
 
+  # https://github.com/valhalla/valhalla/issues/2119
+  postPatch = ''
+    for f in valhalla/mjolnir/transitpbf.h \
+             src/mjolnir/valhalla_query_transit.cc; do
+      substituteInPlace $f --replace 'SetTotalBytesLimit(limit, limit)' \
+                                     'SetTotalBytesLimit(limit)'
+    done
+  '';
+
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [
     zlib curl protobuf prime-server boost sqlite libspatialite