BUG: Mantis-1181: handle hxx and txx in header tests

Utilities/Maintenance/BuildHeaderTest.py

@@ -108,14 +108,18 @@ def main():
         else:
             max_idx = added_header_idx + maximum_number_of_headers
         for i in range(added_header_idx, max_idx):
-            # Use the .hxx if possible.
+            # Use the .hxx or .txx if possible.
             hxx_file = h_files[i][:-1] + 'hxx'
+            txx_file = h_files[i][:-1] + 'txx'
             # Files that include VTK headers need to link to VTK.
             if h_files[i] in BANNED_HEADERS or h_files[i].lower().find('vtk') != -1:
                 to_include = '// #include "' + h_files[i] + '" // Banned in BuildHeaderTest.py\n'
             elif os.path.exists(os.path.join(module_source_path, 'include',
                 hxx_file)):
                 to_include = '#include "' + hxx_file + '"\n'
+            elif os.path.exists(os.path.join(module_source_path, 'include',
+                txx_file)):
+                to_include = '#include "' + txx_file + '"\n'
             else:
                 to_include = '#include "' + h_files[i] + '"\n'