gladeui: Fix previewer build

gladeui/Makefile.am

 ## Previewer
 
 bin_PROGRAMS = glade-previewer
+lib_LTLIBRARIES = libgladeui-2.la
 
 glade_previewer_CPPFLAGS = \
 	-I$(top_srcdir)    \
@@ -41,8 +42,6 @@ common_defines = \
 	-DGLADE_LOCALEDIR="\"$(datadir)/locale\""\
   -DGLADE_BINDIR="\"$(bindir)\""
 
-lib_LTLIBRARIES = libgladeui-2.la
-
 BUILT_SOURCES = glade-marshallers.c glade-marshallers.h
 
 EXTRA_DIST = glade-marshallers.list gladeui.rc.in icon-naming-spec.c glade-previewer.rc.in