fix GOROOT checking

dev.env

@@ -11,14 +11,6 @@ fi
 export GOTOP=$VTTOP/go
 export PYTOP=$VTTOP/py
 
-# GO ROOT sanity
-go_bin=`which go`
-go_env=`go env | grep GOROOT | cut -f 2 -d\"`
-if [ "$go_bin" != "$go_env/bin/go" ]; then
-  echo "WARNING: \$GOROOT may not compatible with the used go binary"
-  echo "Please make sure 'go' comes from \$GOROOT/bin"
-fi
-
 function prepend_path()
 {
   # $1 path variable
@@ -45,6 +37,16 @@ if [ "$GOBIN" ]; then
   export PATH=$(prepend_path $PATH $GOBIN)
 fi
 
+# GOROOT sanity
+go_bin=`which go`
+go_env=`go env | grep GOROOT | cut -f 2 -d\"`
+if [ "$go_bin" -a "$go_bin" != "$go_env/bin/go" ]; then
+  echo "WARNING: \$GOROOT may not compatible with the used go binary"
+  echo "Please make sure 'go' comes from \$GOROOT/bin"
+  echo "go_env: $go_env"
+  echo "go_bin: $go_bin"
+fi
+
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