[ecmascript] Guard for builds without mozjs. Refs #81

src/ecmascript/ecmascript.h

@@ -5,6 +5,12 @@
 /* In the future you will get DOM, a complete ECMAScript interface and free
  * plasm displays for everyone. */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef CONFIG_ECMASCRIPT
+
 #include <jsapi.h>
 
 #include "main/module.h"
@@ -105,3 +111,5 @@ void ecmascript_set_timeout2(struct ecmascript_interpreter *interpreter, JS::Han
 extern struct module ecmascript_module;
 
 #endif
+
+#endif