Resolves: tdf#101540 add Silesian [szl-PL] to language list

Change-Id: I7f73a6286d080a5ebf1b7a1bb834a06f51be6529

i18nlangtag/source/isolang/isolang.cxx

@@ -663,6 +663,7 @@ static IsoLanguageCountryEntry const aImplIsoLangEntries[] =
     { LANGUAGE_USER_APATANI,               "apt", "IN", 0     },
     { LANGUAGE_USER_ENGLISH_MAURITIUS,      "en", "MU", 0     },
     { LANGUAGE_USER_FRENCH_MAURITIUS,       "fr", "MU", 0     },
+    { LANGUAGE_USER_SILESIAN,              "szl", "PL", 0     },
     { LANGUAGE_MULTIPLE,                   "mul", ""  , 0     },    // multiple languages, many languages are used
     { LANGUAGE_UNDETERMINED,               "und", ""  , 0     },    // undetermined language, language cannot be identified
     { LANGUAGE_NONE,                       "zxx", ""  , 0     },    // added to ISO 639-2 on 2006-01-11: Used to declare the absence of linguistic information

include/i18nlangtag/lang.h

@@ -716,6 +716,7 @@ typedef unsigned short LanguageType;
 #define LANGUAGE_USER_APATANI               0x0698
 #define LANGUAGE_USER_ENGLISH_MAURITIUS     0x9C09  /* makeLangID( 0x27, getPrimaryLanguage( LANGUAGE_ENGLISH_UK)) */
 #define LANGUAGE_USER_FRENCH_MAURITIUS      0x900C  /* makeLangID( 0x24, getPrimaryLanguage( LANGUAGE_FRENCH)) */
+#define LANGUAGE_USER_SILESIAN              0x0699
 
 
 /* XXX Add new user defined LCIDs ^^^ there.

svtools/source/misc/langtab.src

@@ -401,6 +401,7 @@ StringArray STR_ARR_SVT_LANGUAGE_TABLE
         < "Apatani" ; LANGUAGE_USER_APATANI ; > ;
         < "English (Mauritius)" ; LANGUAGE_USER_ENGLISH_MAURITIUS ; > ;
         < "French (Mauritius)" ; LANGUAGE_USER_FRENCH_MAURITIUS ; > ;
+        < "Silesian" ; LANGUAGE_USER_SILESIAN ; > ;
     };
 };