[sysprof] binfile: fix warning on non-Linux platforms

[Christian Hergert <chergert src gnome org>]

commit 6e4413d3aa8fac2d2d68877ad6610f08ce4d81bc
Author: Christian Hergert <chergert redhat com>
Date:   Mon Nov 16 14:17:09 2020 -0800

    binfile: fix warning on non-Linux platforms

 src/libsysprof/binfile.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
---
diff --git a/src/libsysprof/binfile.c b/src/libsysprof/binfile.c
index 36e7707..2f10873 100644
--- a/src/libsysprof/binfile.c
+++ b/src/libsysprof/binfile.c
@@ -264,12 +264,8 @@ get_debug_binaries (GList               *files,
     return files;
 }
 
-static char **
-get_lines (const char *format,
-           ...)
-  G_GNUC_PRINTF (1, 2);
-
 #ifdef __linux__
+G_GNUC_PRINTF (1, 2)
 static char **
 get_lines (const char *format,
            ...)