Catch exceptions when running a sub-Nmap in the profile editor.

CHANGELOG

@@ -1,5 +1,8 @@
 # Nmap Changelog ($Id$); -*-text-*-
 
+o [Zenmap] Fixed a crash in the profile editor that would happen when
+  the nmap binary couldn't be found. [David Fifield]
+
 o Made the various Makefiles' treatment of makefile.dep uniform:
   "make clean" keeps the file and "make distclean" deletes it.
   [Michael McTernan]

zenmap/zenmapGUI/ScriptInterface.py

@@ -251,7 +251,12 @@ There was an error getting the list of scripts from Nmap. Try upgrading Nmap.\
         stderr = tempfile.TemporaryFile(mode = "rb", prefix = APP_NAME + "-script-help-stderr-")
         log.debug("Script interface: running %s" % repr(command_string))
         nmap_process = NmapCommand(command_string)
+        try:
             nmap_process.run_scan(stderr = stderr)
+        except Exception, e:
+            callback(False, None)
+            stderr.close()
+            return
         stderr.close()
 
         self.script_list_widget.set_sensitive(False)