Fix wrong receiver for PythonObjectLibrary in PMemoryView

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/memoryview/PMemoryView.java

@@ -69,15 +69,15 @@ boolean isBuffer() {
     @ExportMessage
     int getBufferLength(
                     @Shared("readNativeMemoryViewNode") @Cached ReadAttributeFromDynamicObjectNode readNativeMemoryViewNode,
-                    @CachedLibrary("this") PythonObjectLibrary lib) {
+                    @CachedLibrary(limit = "1") PythonObjectLibrary lib) {
         Object nativeMemoryViewObject = readNativeMemoryViewNode.execute(getStorage(), C_MEMORYVIEW);
         return lib.length(nativeMemoryViewObject);
     }
 
     @ExportMessage
     byte[] getBufferBytes(
                     @Shared("readNativeMemoryViewNode") @Cached ReadAttributeFromDynamicObjectNode readNativeMemoryViewNode,
-                    @CachedLibrary("this") PythonObjectLibrary lib,
+                    @CachedLibrary(limit = "1") PythonObjectLibrary lib,
                     @Cached PInteropSubscriptNode subscriptNode,
                     @Cached CastToByteNode castToByteNode) {
         Object nativeMemoryViewObject = readNativeMemoryViewNode.execute(getStorage(), C_MEMORYVIEW);