PATCH: Restore Solaris/x86 Ada bootstrap: tracebak.c warning

[Rainer Orth]

I just noticed that a Solaris/x86 bootstrap (i386-pc-solaris2.10) fails
like this:

/vol/gcc/src/gcc-dist/gcc/ada/tracebak.c: In function '__gnat_backtrace':
/vol/gcc/src/gcc-dist/gcc/ada/tracebak.c:473:11: error: comparison between signed and unsigned integer expressions
/vol/gcc/src/gcc-dist/gcc/ada/tracebak.c:473:11: error: comparison between signed and unsigned integer expressions
/vol/gcc/src/gcc-dist/gcc/ada/tracebak.c:474:5: error: comparison between signed and unsigned integer expressions

The following trivial patch fixes this and allows the bootstrap to
continue; I suppose it counts as obvious?

Ok to commit?

	Rainer

-----------------------------------------------------------------------------
Rainer Orth, Faculty of Technology, Bielefeld University


Thu Jul  2 17:59:19 2009  Rainer Orth  <ro@TechFak.Uni-Bielefeld.DE>

	* tracebak.c [i386 && sun] (IS_BAD_PTR): Use -1UL in comparison.

Index: gcc/ada/tracebak.c
===================================================================
--- gcc/ada/tracebak.c	(revision 149169)
+++ gcc/ada/tracebak.c	(working copy)
@@ -298,7 +298,7 @@ struct layout
 #include <windows.h>
 #define IS_BAD_PTR(ptr) (IsBadCodePtr((void *)ptr))
 #elif defined (sun)
-#define IS_BAD_PTR(ptr) ((unsigned long)ptr == -1)
+#define IS_BAD_PTR(ptr) ((unsigned long)ptr == -1UL)
 #else
 #define IS_BAD_PTR(ptr) 0
 #endif