Coverity check on master@375ea16 CIDs 83526, 83527, 83528, 83529, 83530 :

Logically dead code in file unittests/TEST_basictypes.cpp

- CID 83526: At function test_Corner_toString_fromString() for-loop,
  - use "<=" as comparison operator for staying in loop;
  - replace ++i by i *= 2 on iteration action. Reason: The values of
    the Corner enum are represented as 0x1, 0x2, 0x4, 0x8.

- CID 83527: At function test_RoleType_toString_fromString() for-loop,
  use "<=" as comparison operator for staying in loop.

- CID 83528: At function test_RoleType_toString_fromString() for-loop,
  use "<=" as comparison operator for staying in loop.

- CID 83529: At function test_Region_toString_fromString() for-loop,
  use "<=" as comparison operator for staying in loop.

- CID 83530: At function test_ProgrammingLanguage_toString_fromString()
  for-loop, use "<=" as comparison operator for staying in loop.

CCBUG:340646