[gtkmm/gtkmm-4-0] meson.build: Clean up MSVC build flags

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 4c337742832c907304a3f953d43c3daf0cbc85b7
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue May 11 18:13:33 2021 +0800

    meson.build: Clean up MSVC build flags
    
    Like the last NMake Makefiles commit, drop the ignores for warnings C4251,
    C4273 and C4275 as the code is now free of items that trigger those warnings.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 220ffe03..89e01c03 100644
--- a/meson.build
+++ b/meson.build
@@ -261,7 +261,7 @@ gui_app_ldflags = []
 #       otherwise the program will fail to link unless we defined a WinMain()
 #       for them
 if is_msvc
-  foreach wd : ['/FImsvc_recommended_pragmas.h', '/wd4267', '/wd4530', '/wd4250', '/wd4251', '/wd4273', 
'/wd4275', '/wd4805']
+  foreach wd : ['/FImsvc_recommended_pragmas.h', '/wd4267', '/EHsc', '/wd4250', '/wd4805']
     disabled_warning = cpp_compiler.get_supported_arguments(wd)
     add_project_arguments(disabled_warning, language: 'cpp')
   endforeach