This commit is the result of a general audit of
the expression parser to locate instances where
dyn_cast<>() and isa<>() are used on types, and
replace them with getAs<>() as appropriate.

The difference is that dyn_cast<>() and isa<>()
are essentially LLVM/Clang's equivalent of RTTI
-- that is, they try to downcast the object and
return NULL if they cannot -- but getAs<>() can
traverse typedefs to perform a semantic cast.

llvm-svn: 146537
diff --git a/lldb/source/Expression/ASTResultSynthesizer.cpp b/lldb/source/Expression/ASTResultSynthesizer.cpp
index 6e2551c..0df2a5e 100644
--- a/lldb/source/Expression/ASTResultSynthesizer.cpp
+++ b/lldb/source/Expression/ASTResultSynthesizer.cpp
@@ -333,7 +333,7 @@
         
         QualType ptr_qual_type;
         
-        if (isa<ObjCObjectType>(expr_qual_type))
+        if (expr_qual_type->getAs<ObjCObjectType>() != NULL)
             ptr_qual_type = Ctx.getObjCObjectPointerType(expr_qual_type);
         else
             ptr_qual_type = Ctx.getPointerType(expr_qual_type);