Precompilers, OCI & OCCI :: (ORA-01480) Error While Assigning Value To A Variable?

I am writing a code in Proc as

<code>
#define SMSDUN_LANGID_LEN 10

-- other statements

EXEC SQL BEGIN DECLARE SECTION
char dbLanguageId[SMSDUN_LANGID_LEN + 1];
EXEC SQL END DECLARE SECTION

-- other statements

EXEC SQL EXECUTE
BEGIN
SELECT LANGUAGE_ID -- Length of this column is 10
INTO :dbLanguageId
FROM CUSTOMERATTRIBUTES

[code]...

While executing the above command, it is giving error as "ORA-01480: trailing null missing from STR bind value". Its working in some oracle versions but not in other. where exactly the problem is.