Try to fix the Polly build while I'm trying to get it to build at all locally.

llvm-svn: 156207
diff --git a/polly/lib/Analysis/ScopDetection.cpp b/polly/lib/Analysis/ScopDetection.cpp
index 6572091..5c2dcb0 100644
--- a/polly/lib/Analysis/ScopDetection.cpp
+++ b/polly/lib/Analysis/ScopDetection.cpp
@@ -482,7 +482,7 @@
 
   for (Region::block_iterator I = R.block_begin(), E = R.block_end(); I != E;
        ++I)
-    if (!isValidBasicBlock(*I, Context))
+    if (!isValidBasicBlock(**I, Context))
       return false;
 
   return true;