Fix -Asserts build

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133305 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 9096120..59725b7 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -356,8 +356,7 @@
   }
 
   // Inserting a name that is already defined, get the existing name.
-  const Type *Existing = M->getTypeByName(Name);
-  assert(Existing && "Conflict but no matching type?!");
+  assert(M->getTypeByName(Name) && "Conflict but no matching type?!");
 
   // Otherwise, this is an attempt to redefine a type, report the error.
   return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" +