fix to allow [#24009] to be fixed.

WM_operator_poll() could fail in cases WM_operator_name_call() would succeed because calling the operator would setup the context before calling poll.
this would result in python raising an invalid error or menu items being greyed out.

now python can also check with an operator context:
  bpy.ops.object.editmode_toggle.poll('INVOKE_SCREEN')

release/scripts/modules/bpy/ops.py

@@ -115,14 +115,34 @@ class bpy_ops_submodule_op(object):
     def _get_doc(self):
         return op_as_string(self.idname())
 
+    @staticmethod
+    def _parse_args(args):
+        C_dict = None
+        C_exec = 'EXEC_DEFAULT'
+
+        if len(args) == 0:
+            pass
+        elif len(args) == 1:
+            if type(args[0]) != str:
+                C_dict = args[0]
+            else:
+                C_exec = args[0]
+        elif len(args) == 2:
+            C_exec, C_dict = args
+        else:
+            raise ValueError("1 or 2 args execution context is supported")
+
+        return C_dict, C_exec
+
     __doc__ = property(_get_doc)
 
     def __init__(self, module, func):
         self.module = module
         self.func = func
 
-    def poll(self, context=None):
-        return op_poll(self.idname_py(), context)
+    def poll(self, *args):
+        C_dict, C_exec = __class__._parse_args(args)
+        return op_poll(self.idname_py(), C_dict, C_exec)
 
     def idname(self):
         # submod.foo -> SUBMOD_OT_foo
@@ -135,31 +155,11 @@ class bpy_ops_submodule_op(object):
     def __call__(self, *args, **kw):
 
         # Get the operator from blender
-        if len(args) > 2:
-            raise ValueError("1 or 2 args execution context is supported")
-
-        C_dict = None
-
         if args:
-
-            C_exec = 'EXEC_DEFAULT'
-
-            if len(args) == 2:
-                C_exec = args[0]
-                C_dict = args[1]
-            else:
-                if type(args[0]) != str:
-                    C_dict = args[0]
-                else:
-                    C_exec = args[0]
-
-            if len(args) == 2:
-                C_dict = args[1]
-
+            C_dict, C_exec = __class__._parse_args(args)
             ret = op_call(self.idname_py(), C_dict, kw, C_exec)
-
         else:
-            ret = op_call(self.idname_py(), C_dict, kw)
+            ret = op_call(self.idname_py(), None, kw)
 
         if 'FINISHED' in ret:
             import bpy