cat: fix cat -e and cat -v erroneously numbering 1st line

function                                             old     new   delta
cat_main                                             418     421      +3

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/coreutils/cat.c b/coreutils/cat.c
index 5f02233..fb735f9 100644
--- a/coreutils/cat.c
+++ b/coreutils/cat.c
@@ -112,10 +112,10 @@
 	int retval = EXIT_SUCCESS;
 	int fd;
 #if ENABLE_FEATURE_CATN
-	unsigned lineno = 0;
-	unsigned eol_char = (opts & (CAT_OPT_n|CAT_OPT_b)) ? '\n' : 0x100;
+	bool eol_seen = (opts & (CAT_OPT_n|CAT_OPT_b));
+	unsigned eol_char = (eol_seen ? '\n' : 0x100);
 	unsigned skip_num_on = (opts & CAT_OPT_b) ? '\n' : 0x100;
-	bool eol_seen = 1;
+	unsigned lineno = 0;
 #endif
 
 	BUILD_BUG_ON(CAT_OPT_e != VISIBLE_ENDLINE);