--- jni.c	2005-01-10 09:36:54.012651920 +0000
+++ jni-new.c	2005-01-09 05:51:57.000000000 +0000
@@ -800,17 +800,27 @@
 
 void Jam_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...) {
     va_list jargs;
+    MethodBlock *mb;
+    Object *ob = (Object *)obj;
+ 
     va_start(jargs, methodID);
-    executeMethodVaList((Object*)obj, ((Object*)obj)->class, (MethodBlock*)methodID, jargs);
+    if((mb = lookupVirtualMethod(ob, (MethodBlock*)methodID)) != NULL)
+        executeMethodVaList(ob, ((Object*)obj)->class, mb, jargs);
     va_end(jargs);
 }
 
 void Jam_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list jargs) {
-    executeMethodVaList((Object*)obj, ((Object*)obj)->class, (MethodBlock*)methodID, jargs);
+    MethodBlock *mb;
+    Object *ob = (Object *)obj;
+    if((mb = lookupVirtualMethod(ob, (MethodBlock*)methodID)) != NULL)
+        executeMethodVaList(ob, ((Object*)obj)->class, mb, jargs);
 }
 
 void Jam_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, jvalue *jargs) {
-    executeMethodList((Object*)obj, ((Object*)obj)->class, (MethodBlock*)methodID, (u8*)jargs);
+    MethodBlock *mb;
+    Object *ob = (Object *)obj;
+    if((mb = lookupVirtualMethod(ob, (MethodBlock*)methodID)) != NULL)
+        executeMethodList(ob, ((Object*)obj)->class, mb, (u8*)jargs);
 }
 
 void Jam_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass clazz, jmethodID methodID, ...) {