using NewStringNativeWithLength

src/native/windows/org_lwjgl_Sys.c

@@ -105,7 +105,7 @@ JNIEXPORT jstring JNICALL Java_org_lwjgl_WindowsSysImplementation_getClipboard
 			CloseClipboard();
 			return NULL;
 		}
-		ret = NewStringNative(env, (const char *) clipboard_data);
+		ret = NewStringNativeWithLength(env, (const char *) clipboard_data, strlen(clipboard_data));
 	} else {
 		return NULL;
 	}

src/native/windows/org_lwjgl_opengl_WindowsRegistry.c

@@ -93,7 +93,7 @@ static jstring queryRegistrationKey(JNIEnv *env, HKEY root_key, LPCTSTR subkey,
 				return NULL;
 			}
 			result[buf_size - 1] = '\0';
-			java_result = NewStringNative(env, result);
+			java_result = NewStringNativeWithLength(env, result, strlen(result));
 			free(result);
 			return java_result;
 		}