Error fixes

include/grpcpp/impl/codegen/client_interceptor.h

@@ -20,7 +20,6 @@
 #define GRPCPP_IMPL_CODEGEN_CLIENT_INTERCEPTOR_H
 
 #include <grpcpp/impl/codegen/interceptor.h>
-#include <string>
 
 namespace grpc {
 namespace experimental {
@@ -41,4 +40,5 @@ class ClientInterceptorFactoryInterface {
 
 }  // namespace experimental
 }  // namespace grpc
-#endif /* GRPCPP_IMPL_CODEGEN_CLIENT_INTERCEPTOR_H */
+
+#endif  // GRPCPP_IMPL_CODEGEN_CLIENT_INTERCEPTOR_H

include/grpcpp/impl/codegen/interceptor.h

@@ -64,4 +64,4 @@ class InterceptorBatchMethods {
 }  // namespace experimental
 }  // namespace grpc
 
-#endif /* GRPCPP_IMPL_CODEGEN_INTERCEPTOR_H */
+#endif  // GRPCPP_IMPL_CODEGEN_INTERCEPTOR_H

src/cpp/client/channel_cc.cc

@@ -57,7 +57,9 @@ Channel::Channel(
         interceptor_creators)
     : host_(host), c_channel_(channel) {
   auto vector = interceptor_creators.release();
-  interceptor_creators_ = std::move(*vector);
+  if (vector != nullptr) {
+    interceptor_creators_ = std::move(*vector);
+  }
   g_gli_initializer.summon();
 }