print newline after csv headers

src/output_modules/module_csv.c

@@ -45,6 +45,7 @@ int csv_init(struct state_conf *conf, char **fields, int fieldlens)
 			}
 			fprintf(file, "%s", fields[i]);
 		}
+        fprintf(file, "\n");
 	}
 	return EXIT_SUCCESS;
 }