Add qEnvironmentVariableIntValue()

A lot of code in Qt uses VAR=1 for enabling or disabling some feature
or other, ignoring qEnvironmentVariableIsSet(), which was added for
that purpose. Other code actually reads numerical values from
environment variables. For both use-cases, provide a non-throwing,
non-memory-allocating way to get the numerical (int) value of an
environment variable, complementing qEnvironmentVariableIs{Set,Empty}().

[ChangeLog][QtCore] Added qEnvironmentVariableIntValue().

Change-Id: I81c85287ea10d355c1bbf8d7807ec9a0e477bce0
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

0 files changed, 0 insertions, 0 deletions