Update: update CI and unsafe pointer

.github/workflows/go.yml

@@ -10,10 +10,10 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - name: Set up Go 1.25.0
+      - name: Set up Go 1.26.0
         uses: actions/setup-go@v6
         with:
-          go-version: 1.25.x
+          go-version: 1.26.x
         id: go
 
       - name: Check out code into the Go module directory

robotgo.go

@@ -372,7 +372,7 @@ func CaptureGo(args ...int) Bitmap {
 // CaptureImg capture the screen and return image.Image, error
 func CaptureImg(args ...int) (image.Image, error) {
 	bit := CaptureScreen(args...)
-	if bit == nil {
+	if unsafe.Pointer(bit) == nil {
 		return nil, errors.New("Capture image not found.")
 	}
 	defer FreeBitmap(bit)