Fix fallback define for DECLSPEC for non-Windows platforms. Looks like it was a copy/paste error? GCC doesn't support visibility attributes until gcc4, so just make it blank. Fixes Bugzilla #2720.
diff --git a/include/begin_code.h b/include/begin_code.h
index 4b27976..c032400 100644
--- a/include/begin_code.h
+++ b/include/begin_code.h
@@ -64,8 +64,6 @@
# else
# if defined(__GNUC__) && __GNUC__ >= 4
# define DECLSPEC __attribute__ ((visibility("default")))
-# elif defined(__GNUC__) && __GNUC__ >= 2
-# define DECLSPEC __declspec(dllexport)
# else
# define DECLSPEC
# endif