request.h: size of unnamed array is negative

[Hugh McMaster]

I've been adding a new handler to Wine's server.  Unfortunately, I've run into a problem with C_ASSERT that I can't seem to resolve.

In server/request.h, I've added the following code:

C_ASSERT( FIELD_OFFSET(struct get_desktop_workarea_request, spi_workarea) == 16 );
C_ASSERT( sizeof(struct get_desktop_workarea_request) == 16 );
C_ASSERT( FIELD_OFFSET(struct get_desktop_workarea_reply, screen_x) == 4 );
C_ASSERT( FIELD_OFFSET(struct get_desktop_workarea_reply, screen_y) == 4 );
C_ASSERT( sizeof(struct get_desktop_workarea_reply) == 8 );

But the compiler ends with output errors, as in the following:

In file included from request.c:69:0:
request.h:1527:1: error: size of unnamed array is negative
request.h:1528:1: error: size of unnamed array is negative
request.h:1529:1: error: size of unnamed array is negative
request.h:1530:1: error: size of unnamed array is negative
request.h:1531:1: error: size of unnamed array is negative

Each error represents the C_ASSERT code listed above.

I'm probably missing something obvious here. Can someone please offer any advice on resolving these errors?

Thank you.