[librsvg: 1/2] build: fix Windows NMake install when docs aren't built

[Marge Bot <marge-bot src gnome org>]

commit 7e610a6fb8999893e2d34ec5992266c93bbe82a7
Author: Peter Williams <peter newton cx>
Date:   Tue May 17 11:28:31 2022 -0400

    build: fix Windows NMake install when docs aren't built
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/703>

 win32/install-msvc.mak | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/win32/install-msvc.mak b/win32/install-msvc.mak
index fb84be820..044d7f1d3 100644
--- a/win32/install-msvc.mak
+++ b/win32/install-msvc.mak
@@ -26,4 +26,4 @@ install: all
        @if exist librsvg-2.0.pc if not exist $(PREFIX)\lib\pkgconfig mkdir $(PREFIX)\lib\pkgconfig
        @if exist librsvg-2.0.pc move librsvg-2.0.pc $(PREFIX)\lib\pkgconfig
        @if exist Rsvg-$(RSVG_API_VER)\ if not exist $(PREFIX)\doc\Rsvg-$(RSVG_API_VER)\ mkdir 
$(PREFIX)\doc\Rsvg-$(RSVG_API_VER)
-       @copy /b/y Rsvg-$(RSVG_API_VER)\* $(PREFIX)\doc\Rsvg-$(RSVG_API_VER)
+       @if exist Rsvg-$(RSVG_API_VER)\ copy /b/y Rsvg-$(RSVG_API_VER)\* $(PREFIX)\doc\Rsvg-$(RSVG_API_VER)