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don't strstr on null/blank strings.
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7027 d0543943-73ff-0310-b7d9-9358b9ac24b2
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@@ -1275,7 +1275,7 @@ void sofia_presence_handle_sip_i_message(int status,
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const char *subject = "n/a";
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char *msg = NULL;
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if (sip->sip_content_type) {
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if (sip->sip_content_type && !switch_strlen_zero(sip->sip_content_type->c_subtype)) {
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if (strstr(sip->sip_content_type->c_subtype, "composing")) {
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return;
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}
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