re PR libgcj/12058 (java.lang.reflect.Array.set(Object, int, Object) throws java.lang.IllegalArgumentException)

PR java/12058:
	* java/lang/reflect/natArray.cc (set): Allow null as argument.

From-SVN: r70813

libjava/java/lang/reflect/natArray.cc

@@ -364,7 +364,7 @@ java::lang::reflect::Array::set (jobject array, jint index,
 {
   // We don't have to call getElementType here, or check INDEX,
   // because it was already done in the Java wrapper.
-  if (! _Jv_IsInstanceOf (value, elType))
+  if (value != NULL && ! _Jv_IsInstanceOf (value, elType))
     throw new java::lang::IllegalArgumentException;
   elements ((jobjectArray) array) [index] = value;
 }