mshtml: Don't release window if it wasn't created.
-rw-r--r-- 23764 .gitignore
-rw-r--r-- 33888 ANNOUNCE
-rw-r--r-- 13053 AUTHORS
-rw-r--r-- 26434 COPYING.LIB
-rw-r--r-- 1838053 ChangeLog
-rw-r--r-- 824 LICENSE
-rw-r--r-- 1324 LICENSE.OLD
-rw-r--r-- 9237 Make.rules.in
-rw-r--r-- 35328 Makefile.in
-rw-r--r-- 6670 README
-rw-r--r-- 20 VERSION
-rw-r--r-- 5395 aclocal.m4
-rwxr-xr-x 633763 configure
-rw-r--r-- 60844 configure.ac
drwxr-xr-x - dlls
drwxr-xr-x - documentation
drwxr-xr-x - fonts
drwxr-xr-x - include
drwxr-xr-x - libs
drwxr-xr-x - loader
drwxr-xr-x - programs
drwxr-xr-x - server
drwxr-xr-x - tools