BCountry: add SetTo and InitCheck.

Change-Id: I5fbc2a1c0e735d6edeb23672017bb64d1b3f4390
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1872
Reviewed-by: Adrien Destugues <[email protected]>

docs/user/locale/Country.dox

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011 Haiku, Inc. All rights reserved.
+ * Copyright 2011-2019 Haiku, Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -8,8 +8,8 @@
  *		John Scipione, [email protected]
  * 
  * Corresponds to:
- *		headers/os/locale/Country.h	 rev 42274
- *		src/kits/locale/Country.cpp	 rev 42274
+ *		headers/os/locale/Country.h	 rev 53489
+ *		src/kits/locale/Country.cpp	 rev 53489
  */
 
 
@@ -77,6 +77,32 @@
 */
 
 
+/*!
+	\fn status_t BCountry::SetTo(const char* countryCode)
+	\brief Initialize a BCountry from a country code.
+
+	\param countryCode The country code to initialize from.
+
+	\returns Same value as InitCheck.
+
+	\since Haiku R1
+*/
+
+
+/*!
+	\fn status_t BCountry::InitCheck()
+	\brief Check validity of the BCountry object.
+
+	\param countryCode The country code to initialize from.
+
+	\returns B_OK if everything went fine, B_BAD_DATA if the specified country
+	         code is not valid, B_NO_MEMORY if the object could not be
+			 allocated properly.
+
+	\since Haiku R1
+*/
+
+
 /*!
 	\fn status_t BCountry::GetName(BString& name,
 		const BLanguage* displayLanguage = NULL) const