git-gui: Auto-update any A? or M? files during rescan.

If the user has partial includes disabled then it doesn't matter what
state the working directory is in; if the file has been included in
the next commit its index state is A or M and we should immediately
run update-index on the working directory file to bring the index in
sync with the working directory.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

git-gui

@@ -499,8 +499,8 @@ proc rescan_done {fd buf after} {
 		set pathList [list]
 		foreach path [array names file_states] {
 			switch -- [lindex $file_states($path) 0] {
-			AM -
-			MM {lappend pathList $path}
+			A? -
+			M? {lappend pathList $path}
 			}
 		}
 		if {$pathList ne {}} {