Generate Wesnoth version into .po.

data/tools/wmlxgettext

@@ -68,10 +68,21 @@ Usage: wmlxgettext [options] dirpath
    directories are given, all files under the current directory are checked.
 """)
 
+    directory = os.getcwd()
+
+    # Deduce package and version
+    pop_to_top("wmlxgettext")    
+    m = re.search(r"#define VERSION\s+(.*)", open("src/wesconfig.h").read())
+    if not m:
+        print >>sys.stderr, "wmlgettext: can't get Wesnoth version."
+        sys.exit(1)
+    else:
+        version = string_strip(m.group(1))
+
     print '''\
 msgid ""
 msgstr ""
-"Project-Id-Version: PACKAGE VERSION\\n"
+"Project-Id-Version: wesnoth %s\\n"
 "Report-Msgid-Bugs-To: http://bugs.wesnoth.org/\\n"
 "POT-Creation-Date: %s\\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\\n"
@@ -80,10 +91,9 @@ msgstr ""
 "MIME-Version: 1.0\\n"
 "Content-Type: text/plain; charset=UTF-8\\n"
 "Content-Transfer-Encoding: 8bit\\n"
-''' % time.strftime("%Y-%m-%d, %H:%M+0000", time.gmtime())
+''' % (version, time.strftime("%Y-%m-%d, %H:%M+0000", time.gmtime()))
 
     try:
-        directory = '.'
         initialdomain = 'wesnoth'
         domain = None
         verbose = 0