[1/4] wininet: Return error codes explicitly from URLCache functions instead of returning a BOOL and storing the error code in the last error value.

[Rob Shearman]

This makes the code more efficient and allows errors from functions to
be ignored without side-effects.
---
 dlls/wininet/urlcache.c |  350 +++++++++++++++++++++++++++++++++--------------
 1 files changed, 246 insertions(+), 104 deletions(-)
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