Add missing comment.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3300 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/vg_main.c b/coregrind/vg_main.c
index d49d966..33ceb46 100644
--- a/coregrind/vg_main.c
+++ b/coregrind/vg_main.c
@@ -2695,6 +2695,8 @@
    VG_(instr_ptr_offset) = offsetof(VexGuestArchState, ARCH_INSTR_PTR);
 
    //--------------------------------------------------------------
+   // Initialise the pthread model
+   //   p: ?
    //--------------------------------------------------------------
    //if (VG_(clo_model_pthreads))
    //   VG_(pthread_init)();