Fixing compilation of Alpine3D without MPI.

560725a6 · Nander Wever · 4ada666a · 560725a6
Commit 560725a6 authored Aug 31, 2021 by Nander Wever
--- a/alpine3d/MPIControl.h
+++ b/alpine3d/MPIControl.h
@@ -229,7 +229,7 @@ class MPIControl
 			delete[] (char*)in_obj_char;
 		}
 		#else
-		template <class T> void reduce_sum(T& /*obj*/, const bool /*all*/) {}
+		template <class T> void reduce_sum(T& /*obj*/, const bool /*all*/=true) {}
 		#endif

 		#ifdef ENABLE_MPI