Add include of time.h

* Apparently needed for some libpng versions?


git-svn-id: svn://localhost/thomson@65 85ae3b6b-dc8f-4344-a89d-598714f2e4e5
diff --git a/tools/gfx2mo5/png2mo5.c b/tools/gfx2mo5/png2mo5.c
index 7a4a086..2e02e22 100644
--- a/tools/gfx2mo5/png2mo5.c
+++ b/tools/gfx2mo5/png2mo5.c
@@ -8,6 +8,7 @@
 #include <getopt.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <time.h>
 #include <png.h>
 #include "libraw2mo5.h"