Update epanet.c

Trying to isolate bug

src/epanet.c

@@ -2861,22 +2861,18 @@ int DLLEXPORT EN_getdemandname(EN_Project p, int nodeIndex, int demandIndex,
 
     // Locate demand category record and retrieve its name
     list_t *dlist = p->network.Node[nodeIndex].D;
+    if (dlist) {
         list_node_t *lnode = get_nth_list(dlist, demandIndex);
         if (!lnode)
             return 253;
         else
             temp = get_category_name(lnode);
 
-    //for (d = p->network.Node[nodeIndex].D;
-    //    n < demandIndex && d->next != NULL; d = d->next) n++;
-    //if (n != demandIndex) return 253;
-
         if (temp) {
             strcpy(demandName, temp);
-		//else demandName[0] = '\0';
             free(temp);
         }
-
+    }
     return 0;
 }