winedump: Remove dead code (Coverity)

[Andrew Talbot]

This condition is precluded by the previous "else".

-- Andy.
---
Changelog:
    winedump: Remove dead code (Coverity).

diff -urN a/tools/winedump/dump.c b/tools/winedump/dump.c
--- a/tools/winedump/dump.c	2006-08-24 11:57:28.000000000 +0100
+++ b/tools/winedump/dump.c	2006-10-14 12:59:13.000000000 +0100
@@ -257,8 +257,6 @@
     {
 	switch (effective_sig)
 	{
-	case SIG_UNKNOWN: /* shouldn't happen... */
-	    ret = 0; break;
 	case SIG_PE:
 	case SIG_NE:
 	case SIG_LE: