EV_API_DECL inside ev.c

[Christian Wendt he/him]

Hi,

I get the following warning when compiling libev:

libev-4.33/ev.c:2143:31: warning: ‘ev_default_loop_ptr’ initialized and 
declared ‘extern’
  2143 |   EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs 
to be initialised to make it a definition despite extern */
       |                               ^~~~~~~~~~~~~~~~~~~

I don't see that EV_API_DECL is necessary in ev.c. Without EV_API_DECL, 
the warning would not be issued.

If this is about hiding all API in case of EV_API_STATIC, then maybe 
there should be an EV_API_HIDE declared like this:

#if EV_API_STATIC
#define EV_API_HIDE static
#else
#define EV_API_HIDE
#endif

This could be used inside ev.c to hide the ev_default_loop_ptr.

Best regards,
Christian Wendt