Catch ZeroDivisionError in 'Average file size'.

gitstats

 		f.write('<dl>\n')
 		f.write('<dt>Total files</dt><dd>%d</dd>' % data.getTotalFiles())
 		f.write('<dt>Total lines</dt><dd>%d</dd>' % data.getTotalLOC())
-		f.write('<dt>Average file size</dt><dd>%.2f bytes</dd>' % (float(data.getTotalSize()) / data.getTotalFiles()))
+		try:
+			f.write('<dt>Average file size</dt><dd>%.2f bytes</dd>' % (float(data.getTotalSize()) / data.getTotalFiles()))
+		except ZeroDivisionError:
+			pass
 		f.write('</dl>\n')
 
 		# Files :: File count by date