[Bug 97321] Query INFO_LOG_LENGTH for empty info log should return 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97321

            Bug ID: 97321
           Summary: Query INFO_LOG_LENGTH for empty info log should return
                    0
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: qiankun.miao at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

When calling GetProgramiv with pname is INFO_LOG_LENGTH, the length of the info
log, including a null terminator, is returned. If there is no info log, zero is
returned. See the above description in OpenGL spec 4.5, glspec45.core.pdf page
157.

But 1 is returned in Mesa for empty info log which doesn't align with spec.

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