[sysprof] macros: simplify static assert fallback to use __COUNTER__

[Christian Hergert <chergert src gnome org>]

commit 691b6ef34206f71f9306085ca151c9f929ca73bc
Author: Christian Hergert <chergert redhat com>
Date:   Fri Aug 14 12:59:29 2020 -0700

    macros: simplify static assert fallback to use __COUNTER__
    
    It is rather annoying that the other sizeof form doesn't work with Clang.
    This at least gets things working (assuming you have __COUNTER__ support)
    which most things we care about do at this point (including MSVC).

 src/libsysprof-capture/sysprof-macros.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/libsysprof-capture/sysprof-macros.h b/src/libsysprof-capture/sysprof-macros.h
index c5198241..7ffc7c34 100644
--- a/src/libsysprof-capture/sysprof-macros.h
+++ b/src/libsysprof-capture/sysprof-macros.h
@@ -75,7 +75,7 @@
 #elif SYSPROF_GNUC_CHECK_VERSION(4, 6)
 # define SYSPROF_STATIC_ASSERT(expr, msg) _Static_assert(expr, msg)
 #else
-# define SYSPROF_STATIC_ASSERT(expr, msg) ((void) sizeof (char[(expr) ? 1 : -1]))
+# define SYSPROF_STATIC_ASSERT(expr, msg) char __static_assert_##__COUNTER__ [(expr) ? 0 : -1];
 #endif
 
 #if INT_MAX == LONG_MAX