jpegdec: Don't dereference NULL input state if we have no caps in TIME segments

Simply assume that the JPEG frame is not going to be interlaced instead
of crashing.
18 jobs for backport-mr-273-into-1.16-jpegdec-without-caps in 95 minutes and 23 seconds (queued for 8 seconds)
Status Job ID Name Coverage
  Preparation
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gst indent

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manifest

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  Build
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build cerbero android universal

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build cerbero cross win64

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build cerbero fedora x86_64

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gst-ios-12.2
build cerbero ios universal

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gst-macos-10.14
build cerbero macos x86_64

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build fedora x86_64

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build nodebug fedora x86_64

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build static fedora x86_64

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build static nodebug fedora x86_64

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  Test
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integration testsuites fedora

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valgrind bad

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  Integrate
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android universal examples

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