I really don't like it when people break the build.

llvm-svn: 510
diff --git a/llvm/lib/CodeGen/InstrSched/InstrScheduling.cpp b/llvm/lib/CodeGen/InstrSched/InstrScheduling.cpp
index e67df86..825e4546 100644
--- a/llvm/lib/CodeGen/InstrSched/InstrScheduling.cpp
+++ b/llvm/lib/CodeGen/InstrSched/InstrScheduling.cpp
@@ -795,7 +795,7 @@
   
   InstrSchedule::const_iterator NIend = S.isched.end();
   for (InstrSchedule::const_iterator NI = S.isched.begin(); NI != NIend; ++NI)
-    mvec.push_back((*NI)->getMachineInstr());
+    mvec.push_back(const_cast<MachineInstr*>((*NI)->getMachineInstr()));
 }