Merge branch 'master' of https://github.com/longxinH/xhprof

Author: longxinH

README.md

@@ -29,7 +29,7 @@ xhprof.output_dir = /tmp/xhprof
 | --------------- |:-------------:|:-------------:|:---------|
 |xhprof.output_dir  | "" | All |Output directory|
 |xhprof.sampling_interval  | 100000 | v2.* | Sampling interval to be used by the sampling profiler, in microseconds|
-|xhprof.sampling_depth  | 2147483647 | v2.* | Depth to trace call-chain by the sampling profiler|
+|xhprof.sampling_depth  | INT_MAX | v2.* | Depth to trace call-chain by the sampling profiler|
 
 # Added
 ### PDO::exec