WRG: various warning fixes

The title says all.

Note: unless needed, this module can drop C++98 support and use C++11. Then, all the ITK_OVERRIDE macros can be replaced by override.

added 1 commit

• b886a207 - WRG: avoid warnings from OSSIM code

Compare with previous version

added 1 commit

• 4d262d0c - WRG: unused variable

Compare with previous version

merged