Don't treat directories named "python" on the path as interpreters.

configure

@@ -2,7 +2,6 @@
 
 # Zope configure script
 # $Id$
-# $Rev$
 
 #####################################################################
 #                    BEGIN EDITABLE PARAMETERS                      #
@@ -74,7 +73,7 @@ get_python() {
         IFS="$OLDIFS"
         for EXECUTABLE in $EXENAMES; do
             FULL="$DIR/$EXECUTABLE"
-            if [ -x "$FULL" ]; then
+            if [ -x "$FULL" -a ! -d "$FULL" ]; then
                 CMD="import string,sys;a=string.split(sys.version)[0]"
 		# Strip trailing + from version number
 		CMD="$CMD;a=(a[-1]=='+')and(a[:-1])or(a);print a"