Even though we don't unique VLA types, we still need to build a
canonical type where the element type is canonical. Fixes PR7206.

llvm-svn: 104461
diff --git a/clang/test/SemaCXX/c99-variable-length-array.cpp b/clang/test/SemaCXX/c99-variable-length-array.cpp
index a792951..14dc0ae 100644
--- a/clang/test/SemaCXX/c99-variable-length-array.cpp
+++ b/clang/test/SemaCXX/c99-variable-length-array.cpp
@@ -78,3 +78,13 @@
     int array[N]; // expected-error{{fields must have a constant size: 'variable length array in structure' extension will never be supported}}
   };
 }
+
+namespace PR7206 {
+  void f(int x) {
+    struct edge_info {
+      float left;
+      float right;
+    };
+    struct edge_info edgeInfo[x];
+  }
+}