Enable deprecated prototypes when compiling deprecated functions.
Some integer conversion fixes.

lib/zip_utf-8.c

diff --git a/lib/zip_utf-8.c b/lib/zip_utf-8.c
index 4b8e4b1..c0ad7fe 100644
--- a/lib/zip_utf-8.c
+++ b/lib/zip_utf-8.c
@@ -122,8 +122,7 @@
 {
     enum zip_encoding_type enc;
     const zip_uint8_t *name;
-    zip_uint32_t i;
-    int j, ulen;
+    zip_uint32_t i, j, ulen;
 
     if (str == NULL)
 	return ZIP_ENCODING_ASCII;