http-fetch: add missing initialization of argv0_path
http-fetch: add missing initialization of argv0_path

According to c6dfb39 (remote-curl: add missing initialization of
argv0_path, 2009-10-13), programs with "main" must call this to
work correctly on MinGW.

Signed-off-by: Jonathan Nieder <b57189c5f2fd5b3daf3350a77fde90def1080fa5@gmail.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git