Removing old code that leaked.

src/onscreen_keyboard.c

@@ -45,12 +45,10 @@ static void mtw(wchar_t * wtok, char * tok)
   char *wrptr;
   size_t n, in, out;
   iconv_t trans;
-  wchar_t * wch;
 
   n = 255;
   in = 250;
   out = 250;
-  wch = malloc(sizeof(wchar_t) * 255);
   ui16 = malloc(sizeof(Uint16) * 255);
   wrptr = (char *) ui16;