Fix off-by-one error in an assert condition. No functionality change, but better

error detection.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146962 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Serialization/ASTReader.cpp

@@ -4564,7 +4564,7 @@ Decl *ASTReader::GetDecl(DeclID ID) {
   
   unsigned Index = ID - NUM_PREDEF_DECL_IDS;
 
-  if (Index > DeclsLoaded.size()) {
+  if (Index >= DeclsLoaded.size()) {
     Error("declaration ID out-of-range for AST file");
     return 0;
   }