Subpic related classes: Correctly check for failed memory allocation.

The subtitle rendering process can be quite memory hungry and it's not really critical so we try to recover in case of failed memory allocation for one subpic. If the whole subtitle renderer fails to be allocated then we let the program error out.
Sync Renderer: Fix a typo causing the subtitle queue to be reallocated while it might not be necessary.
Sync Renderer: Add forgotten code in 15a84ec2576751bbfb49b8583fb077a43b208b12.
CSpinButtonCtrl: Use 32-bit version of the getter/setter functions.

This commit fixes #4160.
Lite builds: Fix a minor inconsistency regarding the output directory.

Lite debug builds use "mpc-hc_x??_Debug Lite" while release builds always used "mpc-hc_x??" for both normal and lite builds.
Fix: x86 and x64 versions conflicted over file associations.

4f465cf8b81f1da800b1bfc57cc48e317d24fbb5 was incomplete for Vista+.

This commit fixes #4064.
Language menu: Ensure "Language" always appears in English in menu entry.

If "Language" doesn't appear in the translated string, "(Language)" will be appended automatically.