Merge pull request #30 from coiby/covscan_fix_part3

fix "src/dmidecodemodule.c:828:9 warning[-Wanalyzer-possible-null-argument]: use of possibly-NULL opt where non-null expected"

Author: lian-bo

src/dmidecodemodule.c

@@ -825,6 +825,9 @@ initdmidecodemod(void)
         xmlXPathInit();
 
         opt = (options *) malloc(sizeof(options)+2);
+        if (opt == NULL)
+                MODINITERROR;
+
         memset(opt, 0, sizeof(options)+2);
         init(opt);
 #ifdef IS_PY3K