Correct build failure with rawhide gcc

sagemath-polybori.patch

@@ -0,0 +1,14 @@
+diff -up src/sage/libs/polybori/decl.pxd.orig src/sage/libs/polybori/decl.pxd
+--- src/sage/libs/polybori/decl.pxd.orig	2015-09-06 21:05:55.575916057 -0300
++++ src/sage/libs/polybori/decl.pxd	2015-09-06 21:05:57.745916140 -0300
+@@ -12,8 +12,8 @@ cdef extern from "pb_wrap.h":
+         pbdp_asc        "CTypes::dp_asc"
+         pbblock_dlex    "CTypes::block_dlex"
+         pbblock_dp_asc  "CTypes::block_dp_asc"
+-        pbdp            "17"
+-        pbblock_dp      "19"
++        pbdp            "(polybori::COrderEnums::ordercodes)17"
++        pbblock_dp      "(polybori::COrderEnums::ordercodes)19"
+ 
+     cdef enum comparecodes "CCompareEnums::comparecodes":
+         less_than               "CTypes::less_than"

sagemath.spec

@@ -158,6 +158,10 @@ Patch26:	%{name}-ntl9.patch
 # https://bugzilla.redhat.com/show_bug.cgi?id=1243590
 Patch27:	%{name}-qepcad.patch
 
+# Temporary correction for invalid conversion from
+# 'int' to 'polybori::COrderEnums::ordercodes'
+Patch28:	%{name}-polybori.patch
+
 BuildRequires:	4ti2
 BuildRequires:	atlas-devel
 BuildRequires:	cddlib-tools
@@ -645,6 +649,7 @@ popd
 %endif
 %patch26
 %patch27
+%patch28
 
 sed -e 's|@@SAGE_ROOT@@|%{SAGE_ROOT}|' \
     -e 's|@@SAGE_DOC@@|%{SAGE_DOC}|' \