two variable types changes, made lines less than 80 columns

The two variable type changes are only to match type variable
fields actually read from the binary protocol.

src/libssh2_priv.h

@@ -486,9 +486,9 @@ struct transportpacket
                                the buffer */
     int readidx;            /* at what array index we do the next read from
                                the buffer */
-    int packet_length;          /* the most recent packet_length as read from the
+    uint32_t packet_length; /* the most recent packet_length as read from the
                                network data */
-    int padding_length;         /* the most recent padding_length as read from the
+    uint8_t padding_length; /* the most recent padding_length as read from the
                                network data */
     int data_num;           /* How much of the total package that has been read
                                so far. */