Fix problem with output of sprintf when %s format spec is used.

git-svn-id: svn://svn.cc65.org/cc65/trunk@5029 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/ca65/nexttok.c

@@ -548,7 +548,7 @@ static void FuncSPrintF (void)
                 }
 
                 /* Format this argument according to the spec */
-                SB_Printf (&R1, SB_GetConstBuf (&F1), CurTok.SVal);
+                SB_Printf (&R1, SB_GetConstBuf (&F1), SB_GetConstBuf (&CurTok.SVal));
 
                 /* Skip the string constant */
                 NextTok ();