Fix buffer size in linuxNodeGetCPUstats

94f82053 added a space to the string but didn't change the buffer size.
Signed-off-by: NBing Bu Cao <mars@linux.vnet.ibm.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

src/nodeinfo.c

@@ -691,7 +691,7 @@ linuxNodeGetCPUStats(FILE *procstat,
     char line[1024];
     unsigned long long usr, ni, sys, idle, iowait;
     unsigned long long irq, softirq, steal, guest, guest_nice;
-    char cpu_header[3 + INT_BUFSIZE_BOUND(cpuNum)];
+    char cpu_header[4 + INT_BUFSIZE_BOUND(cpuNum)];
 
     if ((*nparams) == 0) {
         /* Current number of cpu stats supported by linux */