FindWin32CACert: return OK even if CA cert isn't found

Bug: http://curl.haxx.se/mail/lib-2011-11/0180.html
Reported by: Mark Brand
diff --git a/src/tool_doswin.c b/src/tool_doswin.c
index b23b50a..ef3899e 100644
--- a/src/tool_doswin.c
+++ b/src/tool_doswin.c
@@ -285,8 +285,6 @@
       if(!config->cacert)
         result = CURLE_OUT_OF_MEMORY;
     }
-    else
-      result = CURLE_SSL_CACERT;
 
     Curl_safefree(buf);
   }