zsh: backport patch zsh/37643

Fixes the disappearance of the prompt when cancelling menu-based tab
completion.

srcpkgs/zsh/patches/37643.patch

@@ -0,0 +1,29 @@
+commit 1d8b5285226afba4f1ef9030cf862c14b975c284
+Author: Peter Stephenson <pws@zsh.org>
+Date:   Fri Jan 15 12:49:42 2016 +0000
+
+    37643: Reset interrupt on key input in menu selection.
+    
+    We don't need to propagate the interrupt further as the interrupt
+    causes the key to be empty, which will exit the widget.  We
+    need to reset the condition as zrefresh() is now more sensitive
+    to errors since 36416 / 32f5d3d8.
+
+diff --git a/Src/Zle/complist.c b/Src/Zle/complist.c
+index 29aaee8..0ccb885 100644
+--- Src/Zle/complist.c
++++ Src/Zle/complist.c
+@@ -2584,6 +2584,12 @@ domenuselect(Hookdef dummy, Chdata dat)
+     	if (!do_last_key) {
+ 	    zmult = 1;
+ 	    cmd = getkeycmd();
++	    /*
++	     * On interrupt, we'll exit due to cmd being empty.
++	     * Don't propagate the interrupt any further, which
++	     * can screw up redrawing.
++	     */
++	    errflag &= ~ERRFLAG_INT;
+ 	    if (mtab_been_reallocated) {
+ 		do_last_key = 1;
+ 		continue;
+

srcpkgs/zsh/template

@@ -1,7 +1,7 @@
 # Template file for 'zsh'
 pkgname=zsh
 version=5.2
-revision=2
+revision=3
 lib32disabled=yes
 build_style=gnu-configure
 make_build_target="all info"