winedump: Write-strings warnings fix

[Andrew Talbot]

Changelog:
    winedump: Write-strings warnings fix.

diff -urN a/tools/winedump/pe.c b/tools/winedump/pe.c
--- a/tools/winedump/pe.c	2006-05-23 13:49:39.000000000 +0100
+++ b/tools/winedump/pe.c	2006-07-13 19:51:33.000000000 +0100
@@ -139,7 +139,7 @@
     "IAT", 		"Delay IAT",	"COM Descript", ""
 };
 
-static char *get_magic_type(WORD magic)
+static const char *get_magic_type(WORD magic)
 {
     switch(magic) {
         case IMAGE_NT_OPTIONAL_HDR32_MAGIC: