fs: cifs: fix array subscript is above array bounds

contains backported changes linux mainline 3.4+

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
fix: warning: 'sport' may be used uninitialized in this function

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
fix: warning: 'dport' may be used uninitialized in this function

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
fix: warning: 'saddr' may be used uninitialized in this function

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
fix: warning: 'daddr' may be used uninitialized in this function

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
fix: warning: 'protocol' may be used uninitialized in this function

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
fix: warning: 'sport' may be used uninitialized in this function

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
fix: warning: 'dport' may be used uninitialized in this function

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>