stake: Override false positive vet error.

This adds a directive to instruct gometalinter to ignore a false
positive produced by vet.  The code in question intentionally makes use
of the property vet is warning about.

blockchain/stake/internal/tickettreap/common.go

@@ -12,7 +12,9 @@ import (
 )
 
 const (
-	// ptrSize is the number of bytes in a native pointer
+	// ptrSize is the number of bytes in a native pointer.
+	//
+	// nolint: vet
 	ptrSize = 4 << (^uintptr(0) >> 63)
 
 	// staticDepth is the size of the static array to use for keeping track

run_tests.sh

@@ -40,7 +40,7 @@ testrepo () {
     --enable=vet \
     --enable=gosimple \
     --enable=unconvert \
-    --enable=ineffassign ./... | tee /dev/stderr
+    --enable=ineffassign "$TESTDIRS"
   if [ $? != 0 ]; then
     echo 'gometalinter has some complaints'
     exit 1