Cleanup MIN/MAX Macro usage in eicon/istream.c

@@ -92,7 +92,7 @@ int diva_istream_write (void* context,
     return (-1); /* was not able to write       */
    break;     /* only part of message was written */
   }
-  to_write = MIN(length, DIVA_DFIFO_DATA_SZ);
+  to_write = min(length, DIVA_DFIFO_DATA_SZ);
   if (to_write) {
    a->ram_out_buffer (a,
 #ifdef PLATFORM_GT_32BIT

@@ -176,7 +176,7 @@ int diva_istream_read (void* context,
     return (-1); /* was not able to read */
    break;
   }
-  to_read = MIN(max_length, tmp[1]);
+  to_read = min(max_length, (int)tmp[1]);
   if (to_read) {
    a->ram_in_buffer(a,
 #ifdef PLATFORM_GT_32BIT