Added the usage report to the examples for when no arguments are passed

to the examples.

examples/osgreflect/osgreflect.cpp

@@ -325,7 +325,7 @@ int main( int argc, char **argv )
     osg::ArgumentParser arguments(&argc,argv);
     
     // set up the usage document, in case we need to print out how to use this program.
-    arguments.getApplicationUsage()->setCommandLineUsage(arguments.getProgramName()+" [options] filename ...");
+    arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
     arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
     
 
@@ -354,6 +354,12 @@ int main( int argc, char **argv )
         arguments.writeErrorMessages(std::cout);
         return 1;
     }
+    
+    if (arguments.argc()<=1)
+    {
+        arguments.getApplicationUsage()->write(std::cout,osg::ApplicationUsage::COMMAND_LINE_OPTION);
+        return 1;
+    }
 
 
     // read the scene from the list of file specified commandline args.
@@ -362,7 +368,7 @@ int main( int argc, char **argv )
     // if no model has been successfully loaded report failure.
     if (!loadedModel) 
     {
-        std::cout << arguments.getProgramName() <<": No data loaded" << std::endl;
+        std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
         return 1;
     }