Laser range finder: maximum value 4 digits

refs 7886

org.fortiss.af3.platform.raspberry/trunk/lib/src/LaserRangeFinder.c

@@ -35,7 +35,7 @@ GEN_TYPE_int lrf_read() {
     // free buffer
     uart_flush();
 
-    char bytes[5];
+    char bytes[6];
     int n_read = 0;
 
     char value[3];
@@ -48,7 +48,7 @@ GEN_TYPE_int lrf_read() {
     // looks like a blocking call and actually is but is always very fast
     // since it only has to read the queue
     while (1) {
-        n_read = uart_receive(&bytes, 5, 0);
+        n_read = uart_receive(&bytes, 6, 0);
 
         for (i = 0; i < n_read; i++) {
             if (bytes[i] != 0xd && bytes[i] != 0xa) {