Revert explicit PyErr_NoMemory() returns to just returning NULL

- tp_alloc failing is likely to be OOM but we dont know that for a fact,
  and the failing method is responsible for setting the exception

python/header-py.c

@@ -530,7 +530,7 @@ PyTypeObject hdr_Type = {
 PyObject * hdr_Wrap(PyTypeObject *subtype, Header h)
 {
     hdrObject * hdr = (hdrObject *)subtype->tp_alloc(subtype, 0);
-    if (hdr == NULL) return PyErr_NoMemory();
+    if (hdr == NULL) return NULL;
 
     hdr->h = headerLink(h);
     return (PyObject *) hdr;

python/rpmds-py.c

@@ -508,7 +508,7 @@ rpmds dsFromDs(rpmdsObject * s)
 PyObject * rpmds_Wrap(PyTypeObject *subtype, rpmds ds)
 {
     rpmdsObject * s = (rpmdsObject *)subtype->tp_alloc(subtype, 0);
-    if (s == NULL) return PyErr_NoMemory();
+    if (s == NULL) return NULL;
 
     s->ds = ds;
     s->active = 0;

python/rpmfi-py.c

@@ -370,7 +370,7 @@ rpmfi fiFromFi(rpmfiObject * s)
 PyObject * rpmfi_Wrap(PyTypeObject *subtype, rpmfi fi)
 {
     rpmfiObject *s = (rpmfiObject *)subtype->tp_alloc(subtype, 0);
-    if (s == NULL) return PyErr_NoMemory();
+    if (s == NULL) return NULL;
 
     s->fi = fi;
     s->active = 0;

python/rpmkeyring-py.c

@@ -179,7 +179,7 @@ PyTypeObject rpmKeyring_Type = {
 PyObject * rpmPubkey_Wrap(PyTypeObject *subtype, rpmPubkey pubkey)
 {
     rpmPubkeyObject *s = (rpmPubkeyObject *)subtype->tp_alloc(subtype, 0);
-    if (s == NULL) return PyErr_NoMemory();
+    if (s == NULL) return NULL;
 
     s->pubkey = pubkey;
     return (PyObject*) s;
@@ -188,7 +188,7 @@ PyObject * rpmPubkey_Wrap(PyTypeObject *subtype, rpmPubkey pubkey)
 PyObject * rpmKeyring_Wrap(PyTypeObject *subtype, rpmKeyring keyring)
 {
     rpmKeyringObject *s = (rpmKeyringObject *)subtype->tp_alloc(subtype, 0);
-    if (s == NULL) return PyErr_NoMemory();
+    if (s == NULL) return NULL;
 
     s->keyring = keyring;
     return (PyObject*) s;

python/rpmmi-py.c

@@ -192,7 +192,7 @@ PyTypeObject rpmmi_Type = {
 PyObject * rpmmi_Wrap(PyTypeObject *subtype, rpmdbMatchIterator mi, PyObject *s)
 {
     rpmmiObject * mio = (rpmmiObject *)subtype->tp_alloc(subtype, 0);
-    if (mio == NULL) return PyErr_NoMemory();
+    if (mio == NULL) return NULL;
 
     mio->mi = mi;
     mio->ref = s;

python/rpmps-py.c

@@ -121,7 +121,7 @@ PyTypeObject rpmProblem_Type = {
 static PyObject *rpmprob_Wrap(PyTypeObject *subtype, rpmProblem prob)
 {
     rpmProblemObject * s = (rpmProblemObject *)subtype->tp_alloc(subtype, 0);
-    if (s == NULL) return PyErr_NoMemory();
+    if (s == NULL) return NULL;
 
     s->prob = prob;
     return (PyObject *) s;
@@ -282,7 +282,7 @@ rpmps psFromPs(rpmpsObject * s)
 PyObject * rpmps_Wrap(PyTypeObject *subtype, rpmps ps)
 {
     rpmpsObject * s = (rpmpsObject *)subtype->tp_alloc(subtype, 0);
-    if (s == NULL) return PyErr_NoMemory();
+    if (s == NULL) return NULL;
 
     s->ps = ps; /* XXX refcounts? */
     s->psi = NULL;

python/rpmtd-py.c

@@ -107,7 +107,7 @@ static PyObject *rpmtd_new(PyTypeObject * subtype, PyObject *args, PyObject *kwd
     if (noext) flags &= ~HEADERGET_EXT;
 
     if ((s = (rpmtdObject *)subtype->tp_alloc(subtype, 0)) == NULL)
-	return PyErr_NoMemory();
+	return NULL;
 
     headerGet(h, tag, &(s->td), flags);
 

python/rpmte-py.c

@@ -312,7 +312,7 @@ PyTypeObject rpmte_Type = {
 PyObject * rpmte_Wrap(PyTypeObject *subtype, rpmte te)
 {
     rpmteObject *s = (rpmteObject *)subtype->tp_alloc(subtype, 0);
-    if (s == NULL) return PyErr_NoMemory();
+    if (s == NULL) return NULL;
 
     s->te = te;
     return (PyObject *) s;

python/rpmts-py.c

@@ -848,7 +848,7 @@ PyTypeObject rpmts_Type = {
 PyObject * rpmts_Wrap(PyTypeObject *subtype, rpmts ts)
 {
     rpmtsObject * s = (rpmtsObject *)subtype->tp_alloc(subtype, 0);
-    if (s == NULL) return PyErr_NoMemory();
+    if (s == NULL) return NULL;
 
     s->ts = ts;
     s->scriptFd = NULL;

python/spec-py.c

@@ -228,7 +228,7 @@ PyObject *
 spec_Wrap(PyTypeObject *subtype, rpmSpec spec) 
 {
     specObject * s = (specObject *)subtype->tp_alloc(subtype, 0);
-    if (s == NULL) return PyErr_NoMemory();
+    if (s == NULL) return NULL;
 
     s->spec = spec; 
     return (PyObject *) s;