improve lcurses

rockspec/ltui-1.5-1.rockspec

@@ -1,8 +1,8 @@
 package = "ltui"
-version = "1.4-1"
+version = "1.5-1"
 source = {
     url = "git://github.com/tboox/ltui",
-    tag = "v1.4"
+    tag = "v1.5"
 }
 description = {
     detailed = [[

src/core/lcurses/lcurses.c

@@ -763,7 +763,9 @@ static int lc_pair_content(lua_State *L)
 #ifdef COLORS
 LC_NUMBER2(COLORS, COLORS)
 #endif
+#ifdef COLOR_PAIRS
 LC_NUMBER2(COLOR_PAIRS, COLOR_PAIRS)
+#endif
 
 static int lc_COLOR_PAIR(lua_State *L)
 {
@@ -2257,7 +2259,9 @@ static const luaL_Reg curseslib[] =
 #ifdef COLORS
     { "colors",         lc_COLORS       },
 #endif
+#ifdef COLOR_PAIRS
     { "color_pairs",    lc_COLOR_PAIRS  },
+#endif
     { "color_pair",     lc_COLOR_PAIR   },
 
     /* termattrs */