[quake3-bugzilla] [Bug 5449] New: cl_shownet->integer crash the engine

[bugzilla-daemon at icculus.org]

https://bugzilla.icculus.org/show_bug.cgi?id=5449

           Summary: cl_shownet->integer crash the engine
           Product: ioquake3
           Version: SVN HEAD
          Platform: PC
        OS/Version: Windows Vista
            Status: NEW
          Severity: enhancement
          Priority: P3
         Component: Misc
        AssignedTo: zakk at icculus.org
        ReportedBy: lrq3000 at gmail.com
         QAContact: quake3-bugzilla at icculus.org


In msg.c, there are a few accesses (3 in total) to cl_shownet->integer without
prior checking, which can sometimes make the engine crash. There should be a
prior check for cl_shownet existence.

Eg: if ( cl_shownet->integer >= 2 || cl_shownet->integer == -1 ) {

Should be:
if ( cl_shownet && (cl_shownet->integer >= 2 || cl_shownet->integer == -1) ) {

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