Exit if makepkginfo returns empty pkginfo.

git-svn-id: http://munki.googlecode.com/svn/trunk@952 a4e17f2e-e282-11dd-95e1-755cbddbdd66

code/client/munkiimport

@@ -548,6 +548,10 @@ def main():
     # generate pkginfo for the item
     pkginfo = makePkgInfo(installer_item)
     
+    if not pkginfo:
+        # makepkginfo returned an error
+        exit(-1)
+    
     if not options.nointeractive:
         # try to find existing pkginfo items that match this one
         matchingpkginfo = findMatchingPkginfo(pkginfo)