compiler/libec: Fixed improper usage of GCC compound statement expressions that would...

compiler/libec: Fixed improper usage of GCC compound statement expressions that would break on GCC 4.7 with -O2 (and crash during sdk build) :
1. In builtin containers for [ ] syntax
2. Passing by address template types templated to doubles
3. Also fixed converting double template type to/from generic uint64 (which still worked but were similarly improper)