cogl-trace: Include cogl-trace.h even when not tracing
Public functions in C should be declared before they are defined, and often compilers warn you if you haven't:
../cogl/cogl/cogl-trace.c:237:1: warning: no previous prototype for
‘cogl_set_tracing_enabled_on_thread_with_fd’ [-Wmissing-prototypes]
cogl_set_tracing_enabled_on_thread_with_fd (void *data,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../cogl/cogl/cogl-trace.c:245:1: warning: no previous prototype for
‘cogl_set_tracing_enabled_on_thread’ [-Wmissing-prototypes]
cogl_set_tracing_enabled_on_thread (void *data,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../cogl/cogl/cogl-trace.c:253:1: warning: no previous prototype for
‘cogl_set_tracing_disabled_on_thread’ [-Wmissing-prototypes]
cogl_set_tracing_disabled_on_thread (void *data)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In this case the function declarations were not included because
HAVE_TRACING
isn't defined. But we should still include cogl-trace.h
because it handles the case of HAVE_TRACING
not being defined and
correctly still declares the functions defined in cogl-trace.c
.