[vte] lib: Neuter _VTE_GNUC_NONNULL when compiling libvte

[Christian Persch <chpe src gnome org>]

commit b2ee030f02b49ce44a3999d58d1bd3d486a38bd1
Author: Christian Persch <chpe gnome org>
Date:   Sat Feb 20 12:17:28 2016 +0100

    lib: Neuter _VTE_GNUC_NONNULL when compiling libvte

 src/vte/vtemacros.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/vte/vtemacros.h b/src/vte/vtemacros.h
index bed104d..3f8acf5 100644
--- a/src/vte/vtemacros.h
+++ b/src/vte/vtemacros.h
@@ -29,11 +29,15 @@
 #define _VTE_GNUC_PACKED
 #endif  /* !__GNUC__ */
 
+#ifdef VTE_COMPILATION
+#define _VTE_GNUC_NONNULL(position)
+#else
 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
 #define _VTE_GNUC_NONNULL(position) __attribute__((__nonnull__(position)))
 #else
 #define _VTE_GNUC_NONNULL(position)
 #endif
+#endif
 
 #define _VTE_PUBLIC __attribute__((__visibility__("default"))) extern