astro/mepo: revert 3ee2eb616c to unbreak build

./src/api/bind_signal.zig:48:21: error: expected error union type, found 'void'
    std.os.sigaction(signal_name, &signal_action, null)
                    ^

Reported by:	pkg-fallout

This reverts commit 3ee2eb616c.

astro/mepo/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	mepo
 DISTVERSION=	1.1
-PORTREVISION=	2
+PORTREVISION=	1
 CATEGORIES=	astro geography wayland
 MASTER_SITES=	https://git.sr.ht/~mil/${PORTNAME}/archive/${DISTVERSIONFULL}${EXTRACT_SUFX}?dummy=/
 

astro/mepo/files/patch-src_api_bind__signal.zig

@@ -1,25 +0,0 @@
-https://lists.sr.ht/~mil/mepo-devel/patches/38775
-
---- src/api/bind_signal.zig.orig	2023-02-01 03:43:08 UTC
-+++ src/api/bind_signal.zig
-@@ -39,13 +39,14 @@ fn bind_signal(mepo: *Mepo, signo_str: [:0]const u8, expression: []const u8) !vo
-     }
- 
-     // Register generic signal handler
--    if (0 != std.os.linux.sigaction(signal_name, &.{
-+    const signal_action = std.os.Sigaction{
-         .handler = .{ .handler = utilsdl.sdl_push_event_signal },
--        .mask = [_]u32{0} ** 32,
--        .flags = @as(c_uint, 0),
--    }, null)) {
--        return error.FailedToSetupSighandler;
--    }
-+        .mask = std.os.empty_sigset,
-+        .flags = 0,
-+    };
-+
-+    std.os.sigaction(signal_name, &signal_action, null)
-+        catch return error.FailedToSetupSighandler;
- 
-     if (mepo.table_signals.get(signal_name)) |heap_str| {
-         mepo.allocator.free(heap_str);