Eliminated a compile warning by removing dyn_cast
where isa is good enough.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@144704 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Expression/ClangASTSource.cpp b/source/Expression/ClangASTSource.cpp
index a2597ba..bfdab16 100644
--- a/source/Expression/ClangASTSource.cpp
+++ b/source/Expression/ClangASTSource.cpp
@@ -311,7 +311,7 @@
                                      current_id);
         }
     }
-    else if (const ObjCInterfaceDecl *interface_decl = dyn_cast<ObjCInterfaceDecl>(context.m_decl_context))
+    else if (isa<ObjCInterfaceDecl>(context.m_decl_context))
     {
         FindObjCPropertyDecls(context);
     }