Make branches handle the lack of a symbol table or the lack of a symbol gracefully.

--HG--
extra : convert_revision : 7bb16405999b86f9fa082a6d44da43d346edc182

src/arch/sparc/isa/formats/branch.isa

@@ -170,7 +170,7 @@ output decoder {{
             printMnemonic(response, mnemonic);
             ccprintf(response, "0x%x", target);
 
-            if(symtab->findNearestSymbol(target, symbol, symbolAddr))
+            if(symtab && symtab->findNearestSymbol(target, symbol, symbolAddr))
             {
                 ccprintf(response, " <%s", symbol);
                 if(symbolAddr != target)
@@ -178,6 +178,10 @@ output decoder {{
                 else
                     ccprintf(response, ">");
             }
+            else
+            {
+                ccprintf(response, "<%d>", target);
+            }
 
             return response.str();
         }