[libsoup/fix-brotli-msvc] suop-brotli-decompressor.h: Fix build on Visual Studio

[Chun-wei Fan <fanchunwei src gnome org>]

commit 99677044f5c1b5c91a212aaed8effc491a6ded9a
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Apr 21 13:42:44 2020 +0800

    suop-brotli-decompressor.h: Fix build on Visual Studio
    
    A SOUP_AVAILABLE_IN_2_68 (which expands to __dllspec(dllexport) extern
    was missed in the use of G_DECLARE_FINAL_TYPE (SoupBrotliDecompressor...),
    which broke Visual Studio builds because the first prototype of
    soup_brotli_decompressor_get_type() (that results from the
    G_DECLARE_FINAL_TYPE macro) was not marked with __declspec(dllexport)
    but the second one at line 35 is, which Visual Studio does not allow.

 libsoup/soup-brotli-decompressor.h | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/libsoup/soup-brotli-decompressor.h b/libsoup/soup-brotli-decompressor.h
index a730109f..7dade46c 100644
--- a/libsoup/soup-brotli-decompressor.h
+++ b/libsoup/soup-brotli-decompressor.h
@@ -26,6 +26,7 @@
 G_BEGIN_DECLS
 
 #define SOUP_TYPE_BROTLI_DECOMPRESSOR (soup_brotli_decompressor_get_type())
+SOUP_AVAILABLE_IN_2_68
 G_DECLARE_FINAL_TYPE (SoupBrotliDecompressor, soup_brotli_decompressor, SOUP, BROTLI_DECOMPRESSOR, GObject)
 
 SOUP_AVAILABLE_IN_2_68