Make some assertions on constant expressions static.

llvm-svn: 204012
diff --git a/clang/lib/AST/APValue.cpp b/clang/lib/AST/APValue.cpp
index 5cdeb00..049518e 100644
--- a/clang/lib/AST/APValue.cpp
+++ b/clang/lib/AST/APValue.cpp
@@ -622,7 +622,7 @@
 
 void APValue::MakeLValue() {
   assert(isUninit() && "Bad state change");
-  assert(sizeof(LV) <= DataSize && "LV too big");
+  static_assert(sizeof(LV) <= DataSize, "LV too big");
   new ((void*)(char*)Data.buffer) LV();
   Kind = LValue;
 }