Bug in test sort transactions.

[isaacvr]

Describe the bug
Bug in tests after fixing isSHA256Eq

Environment information:

• Platform: Linux 4.19.0-1-amd64 x86_64
• Go environment:

GOARCH="amd64"
GOBIN=""
GOCACHE="/home/adacosta/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/usr/share/gocode"
GOPROXY=""
GORACE=""
GOROOT="/opt/go"
GOTMPDIR=""
GOTOOLDIR="/opt/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build114971256=/tmp/go-build -gno-record-gcc-switches"

• Compiler info:

gcc (Debian 8.3.0-6) 8.3.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Steps to Reproduce
Steps to reproduce the behavior:

1. Fix this error.
2. make test-libc
3. See error

Actual behavior
Tests fail

lib/cgo/tests/check_coin.transactions.c:983:F:coin.transaction:TestSortTransactions:0: Failed SortTransactions test "invalid fee multiplication is capped"

Expected behavior
Tests should pass

Additional context
skycoin/libskycoin#34

Possible implementation:

• Look at the TestSortTransactions go mplementation.
• Follow this.
• Follow this.
• Follow this.
• Follow this.
• Follow this.
• Follow this.

PD: The "Possible implementation:" just try to make you follow some possible relevant paths than can be relevant in order to find the bug.