gitk: Skip over AUTHOR/COMMIT_DATE when searching all fields

This prevents a search for a number like "105" on "All Fields" from
matching against the raw author and commit timestamps.  These
timestamps were already not searchable by themselves, and the
displayed format does not match the query string anyway.

Signed-off-by: Frédéric Brière <fbriere@fbriere.net>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

gitk

@@ -4659,8 +4659,9 @@ proc askfindhighlight {row id} {
     }
     set info $commitinfo($id)
     set isbold 0
-    set fldtypes [list [mc Headline] [mc Author] [mc Date] [mc Committer] [mc CDate] [mc Comments]]
+    set fldtypes [list [mc Headline] [mc Author] "" [mc Committer] "" [mc Comments]]
     foreach f $info ty $fldtypes {
+	if {$ty eq ""} continue
 	if {($findloc eq [mc "All fields"] || $findloc eq $ty) &&
 	    [doesmatch $f]} {
 	    if {$ty eq [mc "Author"]} {
@@ -6521,7 +6522,7 @@ proc findmore {} {
     if {![info exists find_dirn]} {
 	return 0
     }
-    set fldtypes [list [mc "Headline"] [mc "Author"] [mc "Date"] [mc "Committer"] [mc "CDate"] [mc "Comments"]]
+    set fldtypes [list [mc "Headline"] [mc "Author"] "" [mc "Committer"] "" [mc "Comments"]]
     set l $findcurline
     set moretodo 0
     if {$find_dirn > 0} {
@@ -6582,6 +6583,7 @@ proc findmore {} {
 	    }
 	    set info $commitinfo($id)
 	    foreach f $info ty $fldtypes {
+		if {$ty eq ""} continue
 		if {($findloc eq [mc "All fields"] || $findloc eq $ty) &&
 		    [doesmatch $f]} {
 		    set found 1