crew/88fc92b0b821: patchbomb.py fix

[Giorgos Keramidas]

crew changeset 88fc92b0b8214aa677a40075d03df71bce7e21b2 tries to use
os['PAGER'] to get a copy of os.environ['PAGER'] and breaks the
patchbomb extension.

Attached below is a proposed fix:

# HG changeset patch
# User Giorgos Keramidas <keramida at ceid.upatras.gr>
# Date 1182135135 -10800
# Node ID 469dae025b66850fbb19836a29deb342c881c006
# Parent  88fc92b0b8214aa677a40075d03df71bce7e21b2
patchbomb: use os.environ['PAGER'] to read $PAGER

diff --git a/hgext/patchbomb.py b/hgext/patchbomb.py
--- a/hgext/patchbomb.py
+++ b/hgext/patchbomb.py
@@ -382,8 +382,13 @@ def patchbomb(ui, repo, *revs, **opts):
         if opts['test']:
             ui.status('Displaying ', m['Subject'], ' ...\n')
             ui.flush()
-            if 'PAGER' in os.environ:
-                fp = os.popen(os['PAGER'], 'w')
+            pager = None
+            try:
+                pager = os.environ['PAGER']
+            except KeyError:
+                pass
+            if pager is not None:
+                fp = os.popen(pager, 'w')
             else:
                 fp = ui
             try: