re PR libgcj/11951 (natMethod.cc (_Jv_CallAnyMethodA) should clear ffi_result before ffi_call)

PR libgcj/11951:
	* java/lang/reflect/natMethod.cc (_Jv_CallAnyMethodA): Returns
	void.  Throw VirtualMachineError if ffi fails.  Initialize return
	value.  Added is_jni_call argument; only wrap exception if not a
	JNI call.  Use descriptive message if operation not supported.
	(_Jv_GetTypesFromSignature): Use declaring class' loader to find
	array class.
	* include/jvm.h (_Jv_CallAnyMethodA): Updated declaration.
	* jni.cc (_Jv_JNI_CallAnyMethodV): Updated for new form of
	_Jv_CallAnyMethodA.
	(_Jv_JNI_CallAnyMethodA): Likewise.
	(_Jv_JNI_CallAnyVoidMethodV): Likewise.
	(_Jv_JNI_CallAnyVoidMethodA): Likewise.

From-SVN: r70544

libjava/include/jvm.h

@@ -335,13 +335,14 @@ extern jobject _Jv_CallAnyMethodA (jobject obj, jclass return_type,
 				   jobjectArray args);
 
 union jvalue;
-extern jthrowable _Jv_CallAnyMethodA (jobject obj,
-				      jclass return_type,
-				      jmethodID meth,
-				      jboolean is_constructor,
-				      JArray<jclass> *parameter_types,
-				      jvalue *args,
-				      jvalue *result);
+extern void _Jv_CallAnyMethodA (jobject obj,
+				jclass return_type,
+				jmethodID meth,
+				jboolean is_constructor,
+				JArray<jclass> *parameter_types,
+				jvalue *args,
+				jvalue *result,
+				jboolean is_jni_call = true);
 
 extern jobject _Jv_NewMultiArray (jclass, jint ndims, jint* dims)
   __attribute__((__malloc__));