fix lastPageRef bug

schoolapps/timetable/pdf.py

@@ -23,10 +23,7 @@ def generate_pdf(tex, filename):
                                                                                 os.path.join(BASE_DIR, "latex",
                                                                                              filename))
     # Execute two times to get number of last page
-    process = subprocess.Popen(bash_command.split(), stdout=subprocess.PIPE)
-    output = process.communicate()[0]
-    del output
-    process = subprocess.Popen(bash_command.split(), stdout=subprocess.PIPE)
+    process = subprocess.Popen("{}; {}".format(bash_command, bash_command), stdout=subprocess.PIPE, shell=True)
     output = process.communicate()[0]
     del output