Be a bit more careful when copying and updating the property sheets, so that
we don't accidently change fields with '10' in them that are actually not
indicating the Visual Studio version.
create_props:
for F in `(cd $(top_builddir)/build/win32/vs10 && ls *.props)`; do \
case $$F in \
- *) cat $(top_builddir)/build/win32/vs10/$$F | sed 's/10/$(MSVC_VER)/g' > $(top_builddir)/build/win32/vs$(MSVC_VER)/$$F \
+ *) cat $(top_builddir)/build/win32/vs10/$$F | sed 's/<VSVer>10<\/VSVer>/<VSVer>$(MSVC_VER)<\/VSVer>/g' > $(top_builddir)/build/win32/vs$(MSVC_VER)/$$F \
;; \
esac; \
done