Fix make distcheck on systems that do have swig >= 2.0.10

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23753 57a11ea4-9604-0410-9ed3-97b8803252fd

configure.ac

@@ -517,10 +517,13 @@ then
     then
         AC_MSG_WARN([You don't have SWIG 2.0.10 so you will not be able to "make dist"])
     fi
+    AM_CONDITIONAL([SWIG_DIST_FAIL], test "${gnc_have_swig_2_0_10}" != yes)
+else
+    # When building from tarball, all the prerequisites to build dist are already
+    # met so make sure it's allowed
+    AM_CONDITIONAL([SWIG_DIST_FAIL], test yes != yes)
 fi
 
-AM_CONDITIONAL([SWIG_DIST_FAIL], test "${gnc_have_swig_2_0_10}" != yes)
-
 ### --------------------------------------------------------------------------
 ### LIBXML -- GNOME_XML_LIB is defined by GNOME_XML_CHECK