[gnome-sudoku] Fix build

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 8b638e38a5b3ad6235e976fc2d36edf1fd9d5f7a
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Aug 5 17:31:23 2014 -0500

    Fix build
    
    Obviously the solution to our linker error is to tell Automake to
    compile a file that doesn't exist. This is actually the documented
    solution in the Automake manual. Good God.

 src/Makefile.am |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 61aded3..03d33cd 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -11,6 +11,9 @@ gnome_sudoku_SOURCES = \
        sudoku-printer.vala \
        $(BUILT_SOURCES)
 
+# Force linking with a C++ linker.
+nodist_EXTRA_gnome_sudoku_SOURCES = dummy.cxx
+
 gnome_sudoku_CFLAGS = -w
 
 gnome_sudoku_CPPFLAGS = \