meson: Don't pass GNU-like compiler wargs on MSVC

cl : Command line error D8021 : invalid numeric argument '/Wno-missing-include-dirs'

ext/dts/meson.build

@@ -4,9 +4,12 @@ if not dca_dep.found() and cc.has_header_symbol('dca.h', 'dca_init')
   dca_dep = cc.find_library('dca', required : false)
 endif
 
-# autotools didn't use the libdca pkg-config cflags, and they
-# can point to a non-existing location (/usr/include/dca)
-no_warn_c_args = ['-Wno-missing-include-dirs']
+no_warn_c_args = []
+if cc.get_id() != 'msvc'
+  # autotools didn't use the libdca pkg-config cflags, and they
+  # can point to a non-existing location (/usr/include/dca)
+  no_warn_c_args = ['-Wno-missing-include-dirs']
+endif
 
 if dca_dep.found()
   gstdtsdec = library('gstdtsdec',