Bugfix/read property multiple client errors (#765)

* Fixed variable data type for boolean in RPM structure.

* Fixed RPM error handling to use callback.

* Fixed bacrpm app example when not enough command line parameters are used

* Fixed empty-list EPICS printing.

* Fixed RPM-Ack processing for end of list-of-results

* Added minimal handling for segmentation-not-supported during RPM of object properties.

apps/readpropm/main.c

@@ -496,7 +496,10 @@ int main(int argc, char *argv[])
             }
         }
     }
-    if (tag_value_arg != 0) {
+    if (!Read_Access_Data) {
+        print_usage(filename);
+        return 1;
+    } else if (tag_value_arg != 0) {
         fprintf(stderr, "Error: not enough object property triples.\n");
         return 1;
     }