decklink: Fix CI failure due to missing WINAPI definition

WINAPI is for the windows calling convention to use, and should expand
to nothing on Linux.

https://build.gnome.org/continuous/buildmaster/builds/2017/07/18/76/build/log-gst-plugins-bad.txt

diff --git a/sys/decklink/gstdecklink.h b/sys/decklink/gstdecklink.h
index ab5550c..a630f2b 100644 (file)
--- a/sys/decklink/gstdecklink.h
+++ b/sys/decklink/gstdecklink.h
@@ -46,11 +46,12 @@
 # else
 #  define CONVERT_COM_STRING(s) BSTR _s = (BSTR)s; s = _com_util::ConvertBSTRToString(_s); ::SysFreeString(_s);
 #  define FREE_COM_STRING(s) delete[] s;
-# endif
+# endif /* __MINGW32__ */
 #else
 #define COMSTR_T const char*
 #define CONVERT_COM_STRING(s)
 #define FREE_COM_STRING(s)
+#define WINAPI
 #endif /* G_OS_WIN32 */
 
 typedef enum {