_MSC_VER -> defined _MSC_VER. Fixes building with MinGW.
Similar to fbc91c5e.

check that input images was loaded correctly

(master branch was fixed before, no need to merge this to master!)
- disable openexr (numerous undefined std::min & std::max)
- workaround for two compilator bugs

Also forcing -ggdb3 on android leads to debuging issues.

initialize TIMES variable with some default value (10)