ICU: fix the use of char2wchar_ascii

Pass the fromlen argument as the length of the input string not counting the
null character because it will be added to the output string separatly.
Otherwise you can add it twice and a memory error may occur.

Author: Marina Polyakova

src/port/chklocale.c

@@ -959,12 +959,12 @@ check_icu_winlocale(const char *winlocale)
 		}
 		else
 		{
-			size_t		locale_size = strlen(winlocale) + 1;
-			size_t		locale_wsize = locale_size * sizeof(wchar_t);
-			wchar_t	   *wlocale = (wchar_t*) ALLOC(locale_wsize);
+			size_t		locale_len = strlen(winlocale);
+			wchar_t	   *wlocale = (wchar_t*) ALLOC(
+				(locale_len + 1) * sizeof(wchar_t));
 			/* Locale names use only ASCII */
-			size_t		locale_wlen = char2wchar_ascii(wlocale, locale_wsize,
-													   winlocale, locale_size);
+			size_t		locale_wlen = char2wchar_ascii(wlocale, locale_len + 1,
+													   winlocale, locale_len);
 			if (locale_wlen == -1)
 			{
 				/* there's an error */