Fix: add missing fallback case to 'CheckFunctionResultNode'.

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/TruffleCextBuiltins.java

@@ -551,6 +551,13 @@ Object doForeign(String name, TruffleObject result,
             return result;
         }
 
+        @Fallback
+        Object doGeneric(String name, Object result) {
+            assert result != null;
+            checkFunctionResult(name, false);
+            return result;
+        }
+
         private void checkFunctionResult(String name, boolean isNull) {
             PythonContext context = getContext();
             PException currentException = context.getCurrentException();