ArrayInitializer::toDt should be unreachable
++
simplify the conversion from init to ExpInitializer in VarDeclaration
Cleanup around ArrayInitializer
Reduce init->toExpression() call
simplify Initializer::toExpression
+
fix ICE
++
Remove ErrorInitializer
Support void (static) array initializing - and fix segfault in 2.065
Fix iasm for std.internal.digest.sha_SSSE3 module

Invoke toInteger only for integral manifest constants