[patch] fix memleak at filemanager/find.c:panel_operate()

[and]

fix memleak at filemanager/find.c:panel_operate()

panel_operate() allocate source_with_path_str but never freed

found by LeakSanitizer?

Direct leak of 128 byte(s) in 4 object(s) allocated from:

#0 0x4d60a5 in realloc (/tmp/portage/app-misc/mc-9999/work/mc-9999/src/mc+0x4d60a5)
#1 0x7f15c5ba190d in g_realloc (/usr/lib64/libglib-2.0.so.0+0x6790d)
#2 0x7f15c5bcb493 in g_string_sized_new (/usr/lib64/libglib-2.0.so.0+0x91493)
#3 0x6076ba in strutils_unescape /tmp/portage/app-misc/mc-9999/work/mc-9999/lib/strutil/strescape.c:111:11
#4 0x7cc719 in panel_operate /tmp/portage/app-misc/mc-9999/work/mc-9999/src/filemanager/file.c:2982:29
#5 0x7a702b in copy_cmd /tmp/portage/app-misc/mc-9999/work/mc-9999/src/filemanager/cmd.c:795:9
#6 0x5a64cb in midnight_execute_cmd /tmp/portage/app-misc/mc-9999/work/mc-9999/src/filemanager/midnight.c:1144:9
#7 0x519c47 in buttonbar_callback /tmp/portage/app-misc/mc-9999/work/mc-9999/lib/widget/buttonbar.c:172:42
#8 0x531415 in dlg_try_hotkey /tmp/portage/app-misc/mc-9999/work/mc-9999/lib/widget/dialog.c:464:23
#9 0x52fbfa in dlg_key_event /tmp/portage/app-misc/mc-9999/work/mc-9999/lib/widget/dialog.c:509:19
#10 0x530546 in frontend_dlg_run /tmp/portage/app-misc/mc-9999/work/mc-9999/lib/widget/dialog.c:570:9
#11 0x530165 in dlg_run /tmp/portage/app-misc/mc-9999/work/mc-9999/lib/widget/dialog.c:1267:5
#12 0x5a1cca in do_nc /tmp/portage/app-misc/mc-9999/work/mc-9999/src/filemanager/midnight.c:1762:9
#13 0x4fa3e8 in main /tmp/portage/app-misc/mc-9999/work/mc-9999/src/main.c:418:21
#14 0x7f15c4c72133 in libc_start_main (/lib64/libc.so.6+0x20133)
#15 0x44ed96 in _start (/tmp/portage/app-misc/mc-9999/work/mc-9999/src/mc+0x44ed96)

Signed-off-by: Andreas Mohr <and@…>

[andrew_b]

Thanks!
Applied as [8566e10032418e4b914eb69a7f13577c306f1e56].