Fix MSVC6 warnings. (spotted by Tim Peters)
diff --git a/Modules/cjkcodecs/iso2022common.h b/Modules/cjkcodecs/iso2022common.h
index cb8a159..e042d80 100644
--- a/Modules/cjkcodecs/iso2022common.h
+++ b/Modules/cjkcodecs/iso2022common.h
@@ -183,7 +183,7 @@
                   const unsigned char **inbuf, size_t *inleft)
 {
     unsigned char charset, designation;
-    int  i, esclen;
+    size_t  i, esclen;
 
     for (i = 1;i < MAX_ESCSEQLEN;i++) {
         if (i >= *inleft)