@jaffking found that casesensitive = 0 can cause kernel NULL pointer …

…dereference

so for now fix the BUG till full review WHY we have this BUG.

Thanks jaffking for temp solution.

dorimanx#46

exfat_super.c

@@ -2105,7 +2105,7 @@ static int parse_options(char *options, int silent, int *debug,
 	opts->allow_utime = (unsigned short) -1;
 	opts->codepage = exfat_default_codepage;
 	opts->iocharset = exfat_default_iocharset;
-	opts->casesensitive = 0;
+	opts->casesensitive = 1;
 	opts->errors = EXFAT_ERRORS_RO;
 #ifdef CONFIG_EXFAT_DISCARD
 	opts->discard = 0;