LunaCON: fix mistranslation of CON "else { if" to Lua "elseif".

When encountering a non-empty statement inside braces, emit "do" ... "end".

git-svn-id: https://svn.eduke32.com/eduke32@3840 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/eduke32/source/lunatic/lunacon.lua

@@ -3086,7 +3086,7 @@ local Grammar = Pat{
           * sp1 * Var("single_stmt") * (lpeg.Cc(nil) / on.while_end),
 
     stmt_common = Keyw("{") * sp1 * "}" / ""  -- space separation of commands in CON is for a reason!
-        + Keyw("{") * sp1 * lpeg.Ct(stmt_list) * sp1 * "}"
+        + lpeg.Ct(Keyw("{")/"do" * sp1 * stmt_list * sp1 * (Keyw("}")/"end"))
         + con_inner_command + Var("switch_stmt") + lpeg.Ct(Var("while_stmt")),
 
     single_stmt = Stmt( lone_else^-1 * (Var("stmt_common") + Var("if_stmt")) ),

polymer/eduke32/source/lunatic/test/else_brace_if.con

@@ -0,0 +1,16 @@
+
+actor 1890 1
+    // The following "else { if" must not be translated to an "elseif".
+    ifcount 1 nullop else
+    {
+        ifvare 0 0
+            spawn 1
+        else
+            spawn 2
+
+        ifvare 1 1
+            spawn 3
+        else ifvare 1 2
+            spawn 4
+    }
+enda