Warning fixes from Christos Zoulas

- shadowed variables
- signed/unsigned confusion
- const lossage
- incomplete structure initializations
- unused code

lib/gssapi/krb5/cfx.c

@@ -285,7 +285,8 @@ _gssapi_wrap_cfx_iov(OM_uint32 *minor_status,
     gss_iov_buffer_desc *header, *trailer, *padding;
     size_t gsshsize, k5hsize;
     size_t gsstsize, k5tsize;
-    size_t i, rrc = 0, ec = 0;
+    size_t rrc = 0, ec = 0;
+    int i;
     gss_cfx_wrap_token token;
     krb5_error_code ret;
     int32_t seq_number;
@@ -666,7 +667,7 @@ unrotate_iov(OM_uint32 *minor_status, size_t rrc, gss_iov_buffer_desc *iov, int
 	    q += iov[i].buffer.length;
 	}
     }
-    assert((q - p) == len);
+    assert((size_t)(q - p) == len);
 
     /* unrotate first part */
     q = p + rrc;