fix typo in windows-1252 mime charset name. 

Reference: /n/sources/patch/applied/tcs-mime-windows-1252
Date: Thu Apr 20 02:48:26 CES 2006
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/tcs/tcs.c	Thu Apr 20 02:47:49 2006
+++ /sys/src/cmd/tcs/tcs.c	Thu Apr 20 02:47:39 2006
@@ -577,14 +577,14 @@
 	{ "viet1", "Vietnamese VSCII-1 (1993)", Table, (void *)tabviet1 },
 	{ "viet2", "Vietnamese VSCII-2 (1993)", Table, (void *)tabviet2 },
 	{ "vscii", "Vietnamese VISCII 1.1 (1992)", Table, (void *)tabviscii },
-	{ "windows1250", "Windows Code Page 1250 (Central Europe)", Table, (void *)tabcp1250 },
-	{ "windows1251", "Windows Code Page 1251 (Cyrillic)", Table, (void *)tabcp1251 },
-	{ "windows1252", "Windows Code Page 1252 (Latin I)", Table, (void *)tabcp1252 },
-	{ "windows1253", "Windows Code Page 1253 (Greek)", Table, (void *)tabcp1253 },
-	{ "windows1254", "Windows Code Page 1254 (Turkish)", Table, (void *)tabcp1254 },
-	{ "windows1255", "Windows Code Page 1255 (Hebrew)", Table, (void *)tabcp1255 },
-	{ "windows1256", "Windows Code Page 1256 (Arabic)", Table, (void *)tabcp1256 },
-	{ "windows1257", "Windows Code Page 1257 (Baltic)", Table, (void *)tabcp1257 },
-	{ "windows1258", "Windows Code Page 1258 (Vietnam)", Table, (void *)tabcp1258 },
+	{ "windows-1250", "Windows Code Page 1250 (Central Europe)", Table, (void *)tabcp1250 },
+	{ "windows-1251", "Windows Code Page 1251 (Cyrillic)", Table, (void *)tabcp1251 },
+	{ "windows-1252", "Windows Code Page 1252 (Latin I)", Table, (void *)tabcp1252 },
+	{ "windows-1253", "Windows Code Page 1253 (Greek)", Table, (void *)tabcp1253 },
+	{ "windows-1254", "Windows Code Page 1254 (Turkish)", Table, (void *)tabcp1254 },
+	{ "windows-1255", "Windows Code Page 1255 (Hebrew)", Table, (void *)tabcp1255 },
+	{ "windows-1256", "Windows Code Page 1256 (Arabic)", Table, (void *)tabcp1256 },
+	{ "windows-1257", "Windows Code Page 1257 (Baltic)", Table, (void *)tabcp1257 },
+	{ "windows-1258", "Windows Code Page 1258 (Vietnam)", Table, (void *)tabcp1258 },
 	{ 0 },
 };