gtksourceview 2.11.2 compile problem.

[John Coppens <john jcoppens com>]

Hello people.

I wanted to recompile gtksourceview 2.11.2, because it was linked to an
older version of libpng, and this caused some problems. 

- The original version (actually installed) was compiled before I
installed gtk3

- Now I have a compile (not configure) error.

- Checking, it seems the the configure script checks if gtk3 is
installed, and, if so, always tries to link with gtk3 (that, by itself,
seems strange - gtksourceview 2.xx - < 2.90 - linking with gtk3?)

- I can't see any option to select/force configuration with gtk2

Short of uninstalling gtk3 - is there a possibility to compile
sourceview for 2.0?

This is the make error:

  CC     gtksourcecompletionwords.lo
In file included from gtksourcecompletionwords.c:27:0: ../../../gtksourceview/gtksourcecompletion.h:60:2: 
error: expected specifier-qualifier-list before âGtkObjectâ 
make[5]: ***[gtksourcecompletionwords.lo] Error 1 
make[5]: Leaving directory`/usr/local/src/gnome/gtksourceview-2.11.2/gtksourceview/completion-providers/words'

Here's the test in configure:

if test -n "$PKG_CONFIG" && \
    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"gtk+-3.0 >= 2.90\""; }
  ($PKG_CONFIG --exists --print-errors "gtk+-3.0 >= 2.90") 2>&5
  ac_status=$?
  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; then
  
                        GTK_REQUIRED=gtk+-3.0
                        GTK_REQUIRED_VERSION=2.90.0
                        GTK_TYPELIB=Gtk-3.0

else

                        GTK_REQUIRED=gtk+-2.0
                        GTK_REQUIRED_VERSION=2.16.0
                        GTK_TYPELIB=Gtk-2.0

fi