[gtk/gtk-3-24] Visual Studio projects: Do not hardcode gdbus-codegen path

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

commit 985e17772b9ef7ffd86d4ed851d06e6b39ce7511
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Thu Dec 24 13:48:36 2020 +0800

    Visual Studio projects: Do not hardcode gdbus-codegen path
    
    Instead, use the $(GDBUS_CODEGEN) NMake Makefile variable, so that it may be
    overridden if needed

 win32/generate-msvc.mak | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/win32/generate-msvc.mak b/win32/generate-msvc.mak
index dfcfb34b5e..d579d150bb 100644
--- a/win32/generate-msvc.mak
+++ b/win32/generate-msvc.mak
@@ -117,7 +117,7 @@ all:        \
 
 ..\gtk\gtkdbusgenerated.h ..\gtk\gtkdbusgenerated.c: ..\gtk\gtkdbusinterfaces.xml
        @echo Generating GTK DBus sources...
-       @$(PYTHON) $(PREFIX)\bin\gdbus-codegen  \
+       @$(PYTHON) $(GDBUS_CODEGEN)     \
        --interface-prefix org.Gtk. --c-namespace _Gtk  \
        --generate-c-code gtkdbusgenerated $**  \
        --output-directory $(@D)