do not ignore errors in debian/rules' loops

(two more `set -e`s added, closes: 397499)

debian/changelog

@@ -12,6 +12,8 @@ python-defaults (2.6.5-6) unstable; urgency=low
       521508, thanks to Carl Chenet for the original patch)
     - print nice error message if computed set of supported versions is empty
       (closes: 583392)
+  * debian/rules: do not ignore errors (two more `set -e`s added, closes:
+    397499)
 
   [ Scott Kitterman ]
   * Merge changes back from Ubuntu package:

debian/rules

@@ -95,6 +95,7 @@ clean: control-file
 	rm -rf debian/python-policy.html
 	rm -f faq/*.h2 faq/*.html
 
+	set -e;\
 	for f in debian/*.in; do \
 	    f2=`echo $$f | sed "s,PVER,$(PVER),g;s/VER/$(VER)/g;s,\.in$$,,"`; \
 	    if [ $$f2 != debian/control ]; then \
@@ -107,6 +108,7 @@ clean: control-file
 stamp-control:
 	: # We have to prepare the various control files
 
+	set -e;\
 	for f in debian/*.in; do \
 	    f2=`echo $$f | sed "s,PVER,$(PVER),g;s/VER/$(VER)/g;s,\.in$$,,"`; \
 	    if [ $$f2 != debian/control ]; then \