Consider file encoding for modules in reconfigure

If the modules are not in utf8 then we warn and skip that file
like it happens for layout files.

It would be nice in both cases to have a warn in the gui and not only in the config.log

lib/configure.py

@@ -1562,9 +1562,17 @@ def checkModulesConfig():
           continue
 
       seen.append(filename)
+      try:
           retval = processModuleFile(file, filename)
           if retval:
               tx.write(retval)
+      except UnicodeDecodeError:
+          logger.warning("**************************************************\n"
+                         "Module file '%s'\n"
+                         "cannot be decoded in utf-8.\n"
+                         "Please check if the file has the correct encoding.\n"
+                         "Skipping this file!\n"
+                         "**************************************************" % filename)
   tx.close()
   logger.info('\tdone')