Adding temptative loading of urban trajectory files, falling back for other...

Adding temptative loading of urban trajectory files, falling back for other folder in case first isn't found

matlab/VA_example_ppa.m

@@ -6,10 +6,13 @@
 
 % Requires ITA-Toolbox, obtain from http://www.ita-toolbox.org
 
-%ppa_folder = '../../../ITAGeometricalAcoustics/ITAPropagationPathSim/tests/CombinedModel/UrbanTrajectory';
 ppa_folder = '../../../dist/win32-x64.vc12/bin/UrbanTrajectory';
 
-if isfolder( ppa_folder ) && ~exist( ppa_folder, 'dir' )
+if ~exist( ppa_folder, 'dir' )
+    ppa_folder = '../../../ITAGeometricalAcoustics/ITAPropagationPathSim/tests/CombinedModel/UrbanTrajectory';
+end
+
+if ~exist( ppa_folder, 'dir' )
     error( 'Could not find trajectory source folder "%s".', ppa_folder )
 end
 ppa_diffraction_model = 'utd';
@@ -173,7 +176,6 @@ for n = n_continue:N
         pu.identifier = pp.identifier;
                 
         [ frequency_mags, gain, delay, valid_p ] = ita_propagation_path_get_data( pp, f, c);
-        ita_res
         
         if ~valid_p %catch for error in ita_propagation_path_get_data
             warning( 'Error in ita_propagation_path_get_data, found invalid path ''%s'', skipping', pp.identifier );