updating get demand name and write demands

Everything passing locally

src/epanet.c

@@ -2873,6 +2873,8 @@ int DLLEXPORT EN_getdemandname(EN_Project p, int nodeIndex, int demandIndex,
             free(temp);
         }
     }
+    else return 253;
+
     return 0;
 }
 

src/inpfile.c

@@ -152,10 +152,10 @@ void write_demands(Project *pr, FILE *f) {
 
                     fprintf(f, "\n%s %-31s", s, s1);
 
-					//if (temp = get_category_name(lnode)) {
-					//	fprintf(f, " ;%s", temp);
-					//	free(temp);
-					//}
+                    if (temp = get_category_name(lnode)) {
+                        fprintf(f, " ;%s", temp);
+                        free(temp);
+                    }
                 }
             }
         }