[Issue 22160] New: importC: Error: redeclaring `module test` as `struct test`

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22160

          Issue ID: 22160
           Summary: importC: Error: redeclaring `module test` as `struct
                    test`
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: critical
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: ibuclaw at gdcproject.org

This compiles:
---
/* test.c */
struct test;
typedef struct test test;
---

This doesn't:
---
/* test.c */
typedef struct test test;
---

Both programs should be considered the same.

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