mshtml: Added nsACString_SetData function and use it instead of nsACString_Init when we return string value.

shell32: Fix FindExecutableW() to not check if lpResult after using it. It's supposed to cause a segfault anyway.

Use SE_ERR_FNF rather than a numeric literal.

This causes lock inversions when the driver accesses the DC.

opengl32: Avoid generating a wrapper for internal functions when we can call the internal one directly.