Fixed findings

List of Findings

Error: GCC_ANALYZER_WARNING (CWE-476): [#def1]
xen-4.19.0-build/xen-4.19.0/tools/misc/xenpm.c: scope_hint: In function ‘print_cxstat’
xen-4.19.0-build/xen-4.19.0/tools/misc/xenpm.c:150:9: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘cxstatinfo.triggers’
xen-4.19.0-build/xen-4.19.0/tools/misc/xenpm.c:26: included_from: Included from here.
#  148|       for ( i = 0; i < cxstat->nr; i++ )
#  149|       {
#  150|->         printf("C%-20d: transition [%20"PRIu64"]\n",
#  151|                  i, cxstat->triggers[i]);
#  152|           printf("                       residency  [%20"PRIu64" ms]\n",

Error: GCC_ANALYZER_WARNING (CWE-476): [#def2]
xen-4.19.0-build/xen-4.19.0/tools/misc/xenpm.c:156:24: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘cxstatinfo.triggers’
#  154|       }
#  155|       for ( i = 0; i < MAX_PKG_RESIDENCIES && i < cxstat->nr_pc; ++i )
#  156|->         if ( cxstat->pc[i] )
#  157|              printf("pc%d                  : [%20"PRIu64" ms]\n", i + 1,
#  158|                     cxstat->pc[i] / 1000000UL);

Error: GCC_ANALYZER_WARNING (CWE-476): [#def3]
xen-4.19.0-build/xen-4.19.0/tools/misc/xenpm.c:160:24: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘cxstatinfo.triggers’
#  158|                     cxstat->pc[i] / 1000000UL);
#  159|       for ( i = 0; i < MAX_CORE_RESIDENCIES && i < cxstat->nr_cc; ++i )
#  160|->         if ( cxstat->cc[i] )
#  161|              printf("cc%d                  : [%20"PRIu64" ms]\n", i + 1,
#  162|                     cxstat->cc[i] / 1000000UL);

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