Minor (silly) change to output

ex22_ec1.c

@@ -19,7 +19,7 @@ int pass_by_reference(int *n)
 int main(int argc, char *argv[])
 {
     int n = 2;
-    log_info("BEGIN: n = %d", n);
+    log_info("n = %d", n);
     log_info("By value example: %d", pass_by_value(n));
     log_info("n = %d", n);
     log_info("By reference example: %d", pass_by_reference(&n));