Fix coregrind header files such that they can be included without
having to worry what other header files may have to be included
beforehand.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13549 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/pub_core_threadstate.h b/coregrind/pub_core_threadstate.h
index 6f25ec9..54dce4a 100644
--- a/coregrind/pub_core_threadstate.h
+++ b/coregrind/pub_core_threadstate.h
@@ -41,6 +41,7 @@
 
 #include "pub_tool_threadstate.h"
 #include "pub_core_libcsetjmp.h"   // VG_MINIMAL_JMP_BUF
+#include "pub_core_vki.h"          // vki_sigset_t
 
 /*------------------------------------------------------------*/
 /*--- Types                                                ---*/