do not use lua-NOT-5.1 include files

.SRCINFO

@@ -1,9 +1,9 @@
 # Generated by mksrcinfo v8
-# Sat May 27 12:22:31 UTC 2017
+# Sat May 27 15:09:54 UTC 2017
 pkgbase = lua51-lpty
 	pkgdesc = pty control for lua 5.1
 	pkgver = 1.2.1
-	pkgrel = 1
+	pkgrel = 2
 	url = http://tset.de/lpty/index.html
 	arch = i686
 	arch = x86_64
@@ -12,7 +12,7 @@ pkgbase = lua51-lpty
 	source = http://tset.de/downloads/lpty-1.2.1-1.tar.gz
 	source = Makefile.patch
 	sha1sums = 56e7679565a5a0bf94371e9ef33a7e3a9a1a7ba5
-	sha1sums = 260122987581be795299cb8f3afff22f79094af0
+	sha1sums = c7d86d854d05d4a941a8a68ffbd59ea4a519ecd3
 
 pkgname = lua51-lpty
 

Makefile.patch

@@ -1,5 +1,5 @@
 --- Makefile.dist	2016-07-18 15:28:52.000000000 +0200
-+++ Makefile	2017-05-27 13:56:10.325084225 +0200
++++ Makefile	2017-05-27 17:06:44.630971965 +0200
 @@ -5,8 +5,9 @@
  
  # try some automatic discovery
@@ -12,15 +12,21 @@
  LUAROOT = $(shell dirname $(LUA_BINDIR))
  
  # Defaults
-@@ -17,7 +18,6 @@
+@@ -15,9 +16,12 @@
+ 
+ CC = gcc
  CFLAGS = -fPIC -Wall $(DEBUG)
++ifeq ($(LUA),lua)
  LUA_INCDIR = $(LUAROOT)/include
++else
++LUA_INCDIR = $(LUAROOT)/include/lua$(LUAVERSION)
++endif
  LUA_LIBDIR = $(LUAROOT)/lib
 -LUA = lua
  
  # OS specialities
  ifeq ($(OS),Darwin)
-@@ -47,7 +47,7 @@
+@@ -47,7 +51,7 @@
  	cp $(TARGET) $(INST_LIBDIR)
  
  test: all

PKGBUILD

@@ -3,7 +3,7 @@
 pkgname=lua51-lpty
 pkgver=1.2.1
 _upstream_rel=1
-pkgrel=1
+pkgrel=2
 pkgdesc="pty control for lua 5.1"
 arch=('i686' 'x86_64')
 url="http://tset.de/lpty/index.html"
@@ -12,7 +12,7 @@ depends=('lua51')
 source=("http://tset.de/downloads/lpty-${pkgver}-${_upstream_rel}.tar.gz"
         "Makefile.patch")
 sha1sums=('56e7679565a5a0bf94371e9ef33a7e3a9a1a7ba5'
-          '260122987581be795299cb8f3afff22f79094af0')
+          'c7d86d854d05d4a941a8a68ffbd59ea4a519ecd3')
 
 prepare() {
   cd "${srcdir}/lpty-${pkgver}-${_upstream_rel}"