Remove extra S_MAXSTAT array allocation in some tools

Fixes: #1280
Signed-off-by: Brenden Blanco <bblanco@gmail.com>

tools/dcstat.py

@@ -49,7 +49,7 @@ enum stats {
     S_MAXSTAT
 };
 
-BPF_ARRAY(stats, u64, S_MAXSTAT + 1);
+BPF_ARRAY(stats, u64, S_MAXSTAT);
 
 /*
  * How this is instrumented, and how to interpret the statistics, is very much

tools/pidpersec.py

@@ -26,7 +26,7 @@ enum stat_types {
     S_MAXSTAT
 };
 
-BPF_ARRAY(stats, u64, S_MAXSTAT + 1);
+BPF_ARRAY(stats, u64, S_MAXSTAT);
 
 static void stats_increment(int key) {
     u64 *leaf = stats.lookup(&key);

tools/vfsstat.py

@@ -49,7 +49,7 @@ enum stat_types {
     S_MAXSTAT
 };
 
-BPF_ARRAY(stats, u64, S_MAXSTAT + 1);
+BPF_ARRAY(stats, u64, S_MAXSTAT);
 
 static void stats_increment(int key) {
     u64 *leaf = stats.lookup(&key);