correct mistake in null pointer. Also identify error in pointer to char debug info generation

tests/c-form/ex7.bpf.c

@@ -19,7 +19,7 @@ struct {
 SEC("tp/syscalls/sys_enter_setuid")
 int handle_setuid_entry(struct trace_event_raw_sys_enter *ctx) {
   struct event data = {};
-
+  struct blk_integrity_iter it = {};
   // Extract UID from the syscall arguments
   data.uid = (unsigned int)ctx->args[0];
   data.ts = bpf_ktime_get_ns();

tests/passing_tests/vmlinux/simple_struct_test.py

@@ -1,6 +1,9 @@
 from pythonbpf import bpf, section, bpfglobal, compile_to_ir, compile
 from vmlinux import TASK_COMM_LEN  # noqa: F401
 from vmlinux import struct_trace_event_raw_sys_enter  # noqa: F401
+# from vmlinux import struct_xdp_md
+# from vmlinux import struct_request
+from vmlinux import struct_blk_integrity_iter
 from ctypes import c_int64
 
 
@@ -24,4 +27,3 @@ def LICENSE() -> str:
 
 
 compile_to_ir("simple_struct_test.py", "simple_struct_test.ll")
-compile()