[vala/staging] compiler: Add OptionFlags.NO_ARG to deprecated "--thread" option

[Rico Tzschichholz <ricotz src gnome org>]

commit 96e55fe536ec81a347af6c038241820e11b5bfb5
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed May 1 17:37:07 2019 +0200

    compiler: Add OptionFlags.NO_ARG to deprecated "--thread" option
    
    It was defined with OptionArg.NONE and never took an extra argument.
    
    Regression of d8e810680f370fac7e9a5e80f8d94316707625c2

 compiler/valacompiler.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/compiler/valacompiler.vala b/compiler/valacompiler.vala
index 7394e45da..d425202f1 100644
--- a/compiler/valacompiler.vala
+++ b/compiler/valacompiler.vala
@@ -128,7 +128,7 @@ class Vala.Compiler {
                { "compile", 'c', 0, OptionArg.NONE, ref compile_only, "Compile but do not link", null },
                { "output", 'o', 0, OptionArg.FILENAME, ref output, "Place output in file FILE", "FILE" },
                { "debug", 'g', 0, OptionArg.NONE, ref debug, "Produce debug information", null },
-               { "thread", 0, OptionFlags.OPTIONAL_ARG, OptionArg.CALLBACK, (void*) option_deprecated, 
"Enable multithreading support (DEPRECATED AND IGNORED)", null },
+               { "thread", 0, OptionFlags.OPTIONAL_ARG | OptionFlags.NO_ARG, OptionArg.CALLBACK, (void*) 
option_deprecated, "Enable multithreading support (DEPRECATED AND IGNORED)", null },
                { "enable-mem-profiler", 0, 0, OptionArg.NONE, ref mem_profiler, "Enable GLib memory 
profiler", null },
                { "define", 'D', 0, OptionArg.STRING_ARRAY, ref defines, "Define SYMBOL", "SYMBOL..." },
                { "main", 0, 0, OptionArg.STRING, ref entry_point, "Use SYMBOL as entry point", "SYMBOL..." },