Remove extraneous assignment

src/main/modcall.c

@@ -847,7 +847,7 @@ static bool modcall_recurse(REQUEST *request, rlm_components_t component, int de
 				h = mod_callabletogroup(this);
 				if (h->vpt) continue;
 
-				null_case = found = this;
+				found = this;
 				break;
 			}