coco3: ttydw: clean up compiler warnings

diff --git a/Kernel/platform-coco3/ttydw.c b/Kernel/platform-coco3/ttydw.c
index 11361ef..4e6e9d9 100644 (file)
--- a/Kernel/platform-coco3/ttydw.c
+++ b/Kernel/platform-coco3/ttydw.c
@@ -117,7 +117,7 @@ int open_ports=0;
 
 
 /* buffer for receiving multiple bytes from vport channels */
-char tbuf[256];
+unsigned char tbuf[256];
 
 
 int mini( int a, int b ){
@@ -236,7 +236,6 @@ void dw_vpoll( ){
                if( buf[0] < 32 ){
                        int i;
                        unsigned char b[3];
-                       char c;
                        int min;
                        int minor=dw_minor( buf[0]-17 );
                        b[0]=DW_SERREADM;
@@ -277,7 +276,7 @@ int dw_carrier( uint8_t minor ){
 
 /* (re) Initializes DW */
 void dw_init( ){
-       char buf[2];
+       unsigned char buf[2];
        buf[0]=DW_INIT;
        buf[1]=0x42;
        dw_transaction( buf,2,buf,1 );