- Autoconf elides branches with only white space so make it valid
  shell code.  

signed-off-by: address@hidden

Index: m4/ax_have_qt.m4
===================================================================
--- m4/ax_have_qt.m4.orig	2011-04-04 16:20:04.894500437 +0200
+++ m4/ax_have_qt.m4	2011-04-04 16:21:59.540853744 +0200
@@ -498,7 +498,7 @@ AC_DEFUN([AX_PATH_QT_DIRECT],
               # We can link with no special library directory.
               ax_qt_lib_dir=
             ], [
-              # Leave ax_qt_lib_dir defined
+             : # Leave ax_qt_lib_dir defined
             ])
           ])
         ])