forward fix PR 15368 (pytorch#15964)

Summary: Forward fix for
pytorch#15368

Reviewed By: metascroy

Differential Revision: D87712225

Author: cccclai

examples/portable/executor_runner/executor_runner.cpp

@@ -212,7 +212,7 @@ int main(int argc, char** argv) {
 
   bool bundle_io = false;
   size_t program_data_len = 0;
-  const void* program_data;
+  const void* program_data = nullptr;
 
 #ifdef ET_BUNDLE_IO_ENABLED
   std::vector<uint8_t> model_file_data = try_load_file(FLAGS_model_path);