Support python(pre|ap)pend on static methods in classic mode

Adding a test that covers this case to the python_append test-suite
Note: staticmethod function has been available since Python 2.2

Examples/test-suite/python/python_append_runme.py

@@ -20,3 +20,10 @@ if grabpath() != os.path.dirname(mypath):
 
 if grabstaticpath() != os.path.basename(mypath):
     raise RuntimeError("grabstaticpath failed")
+
+clearstaticpath()
+if grabstaticpath() != None:
+    raise RuntimeError("Resetting staticfuncpath failed")
+Test.static_func()
+if grabstaticpath() != os.path.basename(mypath):
+    raise RuntimeError("grabstaticpath failed")

Examples/test-suite/python_append.i

@@ -12,6 +12,9 @@ def grabpath():
     return funcpath
 def grabstaticpath():
     return staticfuncpath
+def clearstaticpath():
+    global staticfuncpath
+    staticfuncpath = None
 %}
 
 %pythonappend Test::func %{

Source/Modules/python.cxx

@@ -4710,7 +4710,7 @@ public:
     }
 
     if (shadow) {
-      if (!classic && !Getattr(n, "feature:python:callback") && have_addtofunc(n)) {
+      if (!Getattr(n, "feature:python:callback") && have_addtofunc(n)) {
 	int kw = (check_kwargs(n) && !Getattr(n, "sym:overloaded")) ? 1 : 0;
 	String *parms = make_pyParmList(n, false, false, kw);
 	String *callParms = make_pyParmList(n, false, true, kw);
@@ -4726,8 +4726,6 @@ public:
 	} else {
 	  Printv(f_shadow, tab8, "return ", funcCall(Swig_name_member(NSPACE_TODO, class_name, symname), callParms), "\n\n", NIL);
 	}
-	if (!modern)
-	  Printv(f_shadow, tab4, "if _newclass:\n", tab4, NIL);
 	Printv(f_shadow, tab4, symname, " = staticmethod(", symname, ")\n", NIL);
 
 	if (!modern) {