Python3 compatibility: fix integer problems

In python3 maxint is not defined, but maxsize is defined in both
python2 and python3.

The put_text() will not automatically use a value which came in as
float due to a pior math function and python3 will throw an exception.
The simple answer is to convert it with int() and move on.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>

python/build/nroff.py

@@ -148,6 +148,8 @@ def fatal(msg):
 
 
 def put_text(text, x, y, s):
+    x = int(x)
+    y = int(y)
     extend = x + len(s) - len(text[y])
     if extend > 0:
         text[y] += ' ' * extend