8361871: [GCC static analyzer] complains about use of uninitialized value ckpObject in p11_util.c

Backport-of: 518d5f4bbb78ae35db793d7fd15b3cd35c881664

Author: MBaesken

src/jdk.crypto.cryptoki/share/native/libj2pkcs11/p11_util.c

@@ -1191,7 +1191,7 @@ CK_VOID_PTR jObjectToPrimitiveCKObjectPtr(JNIEnv *env, jobject jObject, CK_ULONG
     jclass jBooleanArrayClass, jIntArrayClass, jLongArrayClass;
     jclass jStringClass;
     jclass jObjectClass, jClassClass;
-    CK_VOID_PTR ckpObject;
+    CK_VOID_PTR ckpObject = NULL;
     jmethodID jMethod;
     jobject jClassObject;
     jstring jClassNameString;