quartz: Fix placement of WINAPI attribute in fnFoundSeek typedef.

MSVC requires that calling conventions appear inside the brackets.
diff --git a/dlls/quartz/filtergraph.c b/dlls/quartz/filtergraph.c
index 42b6da8..c9e4e56 100644
--- a/dlls/quartz/filtergraph.c
+++ b/dlls/quartz/filtergraph.c
@@ -2091,7 +2091,7 @@
     return Filtergraph_Release(This);
 }
 
-typedef HRESULT WINAPI (*fnFoundSeek)(IFilterGraphImpl *This, IMediaSeeking*, DWORD_PTR arg);
+typedef HRESULT (WINAPI *fnFoundSeek)(IFilterGraphImpl *This, IMediaSeeking*, DWORD_PTR arg);
 
 static HRESULT all_renderers_seek(IFilterGraphImpl *This, fnFoundSeek FoundSeek, DWORD_PTR arg) {
     BOOL allnotimpl = TRUE;