Fix the clang part of PR7952: rewrite the specialization of isa<> in DeclBase,
and stop abusing the multi-level dereference isa<> used to allow.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@131804 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index 99bc3f4..7a89bf0 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -999,7 +999,7 @@
       // If we're looking for the case, just see if we can skip each of the
       // substatements.
       for (; Case && I != E; ++I) {
-        HadSkippedDecl |= isa<DeclStmt>(I);
+        HadSkippedDecl |= isa<DeclStmt>(*I);
         
         switch (CollectStatementsForCase(*I, Case, FoundCase, ResultStmts)) {
         case CSFC_Failure: return CSFC_Failure;