FYI: use SYMBOL_SYMTAB accessor

[Tom Tromey <tromey@redhat.com>]

While working on a different patch I noticed a few spots that were not
using the SYMBOL_SYMTAB accessor macro.

This patch fixes these places.  I'm checking it in as obvious.

Tested by rebuilding.

Tom

2012-11-26  Tom Tromey  <tromey@redhat.com>

	* ada-lang.c (user_select_syms): Use SYMBOL_SYMTAB.
	* dwarf2read.c (dw2_find_symbol_file, fixup_go_packaging): Use
	SYMBOL_SYMTAB.
	* skip.c (skip_info): Use SYMBOL_SYMTAB.

Index: ada-lang.c
===================================================================
RCS file: /cvs/src/src/gdb/ada-lang.c,v
retrieving revision 1.380
diff -u -r1.380 ada-lang.c
--- ada-lang.c	12 Nov 2012 17:14:54 -0000	1.380
+++ ada-lang.c	26 Nov 2012 15:51:01 -0000
@@ -3583,7 +3583,7 @@
             (SYMBOL_CLASS (syms[i].sym) == LOC_CONST
              && SYMBOL_TYPE (syms[i].sym) != NULL
              && TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) == TYPE_CODE_ENUM);
-          struct symtab *symtab = syms[i].sym->symtab;
+          struct symtab *symtab = SYMBOL_SYMTAB (syms[i].sym);
 
           if (SYMBOL_LINE (syms[i].sym) != 0 && symtab != NULL)
             printf_unfiltered (_("[%d] %s at %s:%d\n"),
Index: dwarf2read.c
===================================================================
RCS file: /cvs/src/src/gdb/dwarf2read.c,v
retrieving revision 1.713
diff -u -r1.713 dwarf2read.c
--- dwarf2read.c	20 Nov 2012 22:51:04 -0000	1.713
+++ dwarf2read.c	26 Nov 2012 15:51:06 -0000
@@ -3402,7 +3402,7 @@
 	  struct symbol *sym = lookup_block_symbol (block, name, VAR_DOMAIN);
 
 	  if (sym)
-	    return sym->symtab->filename;
+	    return SYMBOL_SYMTAB (sym)->filename;
 	}
       return NULL;
     }
@@ -6754,8 +6754,9 @@
 		  if (strcmp (package_name, this_package_name) != 0)
 		    complaint (&symfile_complaints,
 			       _("Symtab %s has objects from two different Go packages: %s and %s"),
-			       (sym->symtab && sym->symtab->filename
-				? sym->symtab->filename
+			       (SYMBOL_SYMTAB (sym)
+				&& SYMBOL_SYMTAB (sym)->filename
+				? SYMBOL_SYMTAB (sym)->filename
 				: cu->objfile->name),
 			       this_package_name, package_name);
 		  xfree (this_package_name);
Index: skip.c
===================================================================
RCS file: /cvs/src/src/gdb/skip.c,v
retrieving revision 1.8
diff -u -r1.8 skip.c
--- skip.c	9 Aug 2012 06:48:21 -0000	1.8
+++ skip.c	26 Nov 2012 15:51:06 -0000
@@ -304,7 +304,7 @@
 	   if (sym)
 	     ui_out_field_fmt (current_uiout, "what", "%s at %s:%d",
 			       sym->ginfo.name,
-			       sym->symtab->filename,
+			       SYMBOL_SYMTAB (sym)->filename,
 			       sym->line);
 	   else
 	     ui_out_field_string (current_uiout, "what", "?");