Fix CppCheck 'duplicateExpression' warning

BTW, all three cases looks similar. It would be nice to refactor it
to avoid repeating code.
add sane radius increment
-fix sound room params (was not working)
-fixes to DAE exporter
-ios fixes (video)
Merge pull request #867 from adolson/circleshape2d-radius-increment

add sane radius increment to CircleShape2D
Merge pull request #863 from JIghtuse/master

Fix CppCheck 'duplicateExpression' warning
-Ability to ask for documents/pictures/etc system dirs.
-Fixes to animationplayer
-fixes to collada importer
-fixes to vmethod for button