[wmlunits] add some debug info

data/tools/unit_tree/html_output.py

@@ -1123,7 +1123,7 @@ def generate_single_unit_reports(addon, isocode, wesnoth):
         
 def html_postprocess_file(filename, isocode, batchlist):
 
-    print("postprocessing " + filename)
+    print("postprocessing " + filename.encode("utf8"))
     
     chtml = u""
     ehtml = u""

data/tools/wmlunits

@@ -477,6 +477,7 @@ def batch_process():
             ef = open(logname, "a")
             ef.write("<INTERNAL ERROR>\n")
             ef.write("please report as bug")
+            ef.write(str(e))
             ef.write("</INTERNAL ERROR>\n")
             ef.close()
         finally: