Fix two compiler warnings

One of them actually pointed to an invalid condition in an assert.

llvm-svn: 136657
diff --git a/polly/lib/CodeGeneration.cpp b/polly/lib/CodeGeneration.cpp
index 945038c..9f68aed 100644
--- a/polly/lib/CodeGeneration.cpp
+++ b/polly/lib/CodeGeneration.cpp
@@ -1434,7 +1434,7 @@
     //                        bb0
     //                         |
     //                  polly.splitBlock
-    //                     /       \
+    //                     /       \.
     //                     |     startBlock
     //                     |        |
     //               orig_scop   new_scop