[C++] Handle case of polling an image when there is padding at the end of term or if an invalid initial offset is calculated from the position.
[C++] Handle case of polling an image when there is padding at the end of term or if an invalid initial offset is calculated from the position.

EvilMcJerkface/Aeron,mikeb01/Aeron,real-logic/Aeron,EvilMcJerkface/Aeron,EvilMcJerkface/Aeron,real-logic/Aeron,mikeb01/Aeron,galderz/Aeron,galderz/Aeron,real-logic/Aeron,mikeb01/Aeron,galderz/Aeron,galderz/Aeron,real-logic/Aeron,mikeb01/Aeron,EvilMcJerkface/Aeron