python: fix i686 semaphore locking

Closes #5432

srcpkgs/python/patches/fix-i686-semaphore_lock.patch

@@ -0,0 +1,19 @@
+Make sure sval is set before comparing it with self->maxvalue.
+Compare only if the return value was zero.
+This fixes "ValueError: semaphore or lock released too many times"
+which occured only for i686.
+
+--- Modules/_multiprocessing/semaphore.c	2016-12-17 21:05:07.000000000 +0100
++++ Modules/_multiprocessing/semaphore.c	2016-12-31 17:42:30.429238082 +0100
+@@ -382,9 +382,10 @@
+ 
+         /* This check is not an absolute guarantee that the semaphore
+            does not rise above maxvalue. */
++        int res = sem_getvalue(self->handle, &sval);
+         if (sem_getvalue(self->handle, &sval) < 0) {
+             return PyErr_SetFromErrno(PyExc_OSError);
+-        } else if (sval >= self->maxvalue) {
++        } else if (res == 0 && sval >= self->maxvalue) {
+            PyErr_SetString(PyExc_ValueError, "semaphore or lock "
+                            "released too many times");
+            return NULL;

srcpkgs/python/template

@@ -4,7 +4,7 @@
 #
 pkgname=python
 version=2.7.13
-revision=1
+revision=2
 wrksrc="Python-${version}"
 hostmakedepends="pkg-config"
 makedepends="