WII: missing ASCII codes for some keys
GCW0: Initial code for GCW Zero port
PRINCE: Fix potential out-of-bounds write (CID 1248504)

There are kMaxTexts text slots, so kMaxTexts itself is not valid.
PRINCE: Fix potential out-of-bounds reads (CID 1248500, 1248503)

Since heroSetTable[] is an array of int, use >= ARRAYSIZE() instead
of > sizeof().
PRINCE: Fix potential out-of-bounds read (CID 1248502)

Since _opcodes[] has kNumOpcodes elements, kNumOpcodes itself is
not a valid index.
ZVISION: Fix memory leak (CID 1109659)
PRINCE: Fix warning
PRINCE: Fix variable sign
PRINCE: Fix another variable sign
GCW0: Further work on the port
GCW0: Correct launch options
GCW0: Enable analog joystick by default
Merge pull request #524 from AReim1982/WII-1.7.0-Beta-2

WII: missing ASCII codes for some keys
BUILD: Install the theme-able SVG icon

Add missing hicolor SVG icon to install. Retain older pixmaps xpm icon
for now.