Fix OdinMonkey when --disable-ion (no bug, r=me)

js/src/frontend/BytecodeCompiler.cpp

@@ -407,12 +407,14 @@ frontend::CompileFunctionBody(JSContext *cx, HandleFunction fun, CompileOptions
         pn = fn->pn_body;
     }
 
+#ifdef JS_ION
     /*
      * Do asm.js compilation once the parse tree has been fully assembled but
      * before emitting since we need to know whether to emit JSOP_LINKASMJS.
      */
     if (fn->pn_funbox->useAsm && !CompileAsmJS(cx, parser.tokenStream, fn, script))
         return false;
+#endif
 
     if (!SetSourceMap(cx, parser.tokenStream, ss, script))
         return false;