MetaIO: Avoid NULL dereference in MetaOutput::GetUsername
MetaIO: Avoid NULL dereference in MetaOutput::GetUsername

If getpwuid fails return an empty string instead of dereferencing the
NULL "pw" pointer.

Suggested-by: Sean McBride <d7e19930cc1f42c2d0781f4d9e6f1fe5891bf9cf@rogue-research.com>



heimdali/ITK,heimdali/ITK,fedral/ITK,spinicist/ITK,PlutoniumHeart/ITK,BlueBrain/ITK,GEHC-Surgery/ITK,InsightSoftwareConsortium/ITK,fbudin69500/ITK,LucHermitte/ITK,richardbeare/ITK,jcfr/ITK,eile/ITK,zachary-williamson/ITK,msmolens/ITK,jmerkow/ITK,zachary-williamson/ITK,LucHermitte/ITK,blowekamp/ITK,msmolens/ITK,msmolens/ITK,hendradarwin/ITK,stnava/ITK,zachary-williamson/ITK,InsightSoftwareConsortium/ITK,fbudin69500/ITK,fedral/ITK,heimdali/ITK,ajjl/ITK,hinerm/ITK,thewtex/ITK,LucasGandel/ITK,BlueBrain/ITK,Kitware/ITK,fedral/ITK,vfonov/ITK,GEHC-Surgery/ITK,InsightSoftwareConsortium/ITK,biotrump/ITK,fuentesdt/InsightToolkit-dev,PlutoniumHeart/ITK,eile/ITK,LucHermitte/ITK,fuentesdt/InsightToolkit-dev,vfonov/ITK,fbudin69500/ITK,malaterre/ITK,hendradarwin/ITK,InsightSoftwareConsortium/ITK,spinicist/ITK,LucHermitte/ITK,vfonov/ITK,PlutoniumHeart/ITK,atsnyder/ITK,GEHC-Surgery/ITK,BlueBrain/ITK,GEHC-Surgery/ITK,stnava/ITK,LucasGandel/ITK,stnava/ITK,malaterre/ITK,PlutoniumHeart/ITK,eile/ITK,Kitware/ITK,blowekamp/ITK,BRAINSia/ITK,biotrump/ITK,ajjl/ITK,msmolens/ITK,stnava/ITK,ajjl/ITK,biotrump/ITK,jmerkow/ITK,LucHermitte/ITK,richardbeare/ITK,malaterre/ITK,stnava/ITK,atsnyder/ITK,atsnyder/ITK,zachary-williamson/ITK,LucHermitte/ITK,biotrump/ITK,vfonov/ITK,GEHC-Surgery/ITK,Kitware/ITK,spinicist/ITK,BRAINSia/ITK,LucasGandel/ITK,atsnyder/ITK,jmerkow/ITK,msmolens/ITK,hjmjohnson/ITK,fbudin69500/ITK,zachary-williamson/ITK,fedral/ITK,heimdali/ITK,LucasGandel/ITK,LucasGandel/ITK,malaterre/ITK,BRAINSia/ITK,malaterre/ITK,jcfr/ITK,eile/ITK,InsightSoftwareConsortium/ITK,thewtex/ITK,hjmjohnson/ITK,malaterre/ITK,malaterre/ITK,zachary-williamson/ITK,BlueBrain/ITK,spinicist/ITK,jcfr/ITK,Kitware/ITK,fuentesdt/InsightToolkit-dev,jmerkow/ITK,PlutoniumHeart/ITK,hinerm/ITK,LucasGandel/ITK,ajjl/ITK,zachary-williamson/ITK,blowekamp/ITK,BlueBrain/ITK,PlutoniumHeart/ITK,blowekamp/ITK,heimdali/ITK,thewtex/ITK,fuentesdt/InsightToolkit-dev,richardbeare/ITK,spinicist/ITK,fedral/ITK,hinerm/ITK,fbudin69500/ITK,hjmjohnson/ITK,hendradarwin/ITK,jmerkow/ITK,vfonov/ITK,Kitware/ITK,jmerkow/ITK,thewtex/ITK,LucasGandel/ITK,PlutoniumHeart/ITK,jcfr/ITK,spinicist/ITK,jmerkow/ITK,richardbeare/ITK,spinicist/ITK,jcfr/ITK,msmolens/ITK,hendradarwin/ITK,biotrump/ITK,fuentesdt/InsightToolkit-dev,LucasGandel/ITK,heimdali/ITK,InsightSoftwareConsortium/ITK,eile/ITK,blowekamp/ITK,jcfr/ITK,spinicist/ITK,fuentesdt/InsightToolkit-dev,hjmjohnson/ITK,thewtex/ITK,Kitware/ITK,stnava/ITK,eile/ITK,fbudin69500/ITK,fedral/ITK,spinicist/ITK,fbudin69500/ITK,richardbeare/ITK,biotrump/ITK,hinerm/ITK,BlueBrain/ITK,BRAINSia/ITK,richardbeare/ITK,hendradarwin/ITK,atsnyder/ITK,fedral/ITK,hendradarwin/ITK,heimdali/ITK,BRAINSia/ITK,zachary-williamson/ITK,GEHC-Surgery/ITK,vfonov/ITK,atsnyder/ITK,hinerm/ITK,stnava/ITK,hinerm/ITK,thewtex/ITK,biotrump/ITK,ajjl/ITK,BlueBrain/ITK,fbudin69500/ITK,fuentesdt/InsightToolkit-dev,eile/ITK,ajjl/ITK,hjmjohnson/ITK,jcfr/ITK,heimdali/ITK,fuentesdt/InsightToolkit-dev,blowekamp/ITK,hendradarwin/ITK,PlutoniumHeart/ITK,fuentesdt/InsightToolkit-dev,hjmjohnson/ITK,atsnyder/ITK,jmerkow/ITK,eile/ITK,LucHermitte/ITK,fedral/ITK,Kitware/ITK,InsightSoftwareConsortium/ITK,jcfr/ITK,hinerm/ITK,blowekamp/ITK,stnava/ITK,ajjl/ITK,hendradarwin/ITK,biotrump/ITK,stnava/ITK,atsnyder/ITK,BRAINSia/ITK,BRAINSia/ITK,thewtex/ITK,GEHC-Surgery/ITK,msmolens/ITK,zachary-williamson/ITK,hjmjohnson/ITK,vfonov/ITK,hinerm/ITK,hinerm/ITK,atsnyder/ITK,vfonov/ITK,eile/ITK,msmolens/ITK,GEHC-Surgery/ITK,LucHermitte/ITK,blowekamp/ITK,malaterre/ITK,richardbeare/ITK,BlueBrain/ITK,vfonov/ITK,malaterre/ITK,ajjl/ITK