Fix coverity static analysis warning, allocate full ie structure

instead of without data buffer

(close issue ASTERISK-19674)
Reported by: Matt Jordan
Patches:
  ASTERISK-19674.patch (License #5415)
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Merged revisions 365143 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 365155 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@365157 65c4cc65-6c06-0410-ace0-fbb531ad65f3

addons/ooh323c/src/ooq931.c

@@ -142,7 +142,7 @@ EXTERN int ooQ931Decode
       }
       else {
          ie = (Q931InformationElement*) memAlloc (pctxt, 
-                                        sizeof(*ie) - sizeof(ie->data));
+                                        sizeof(*ie));
          if(!ie)
          {
             OOTRACEERR3("Error:Memory - ooQ931Decode - ie(%s, %s)\n",