Fix bug in Objective-C/Swift [Mat initWithSize:**] functions

modules/core/misc/objc/common/Mat.mm

@@ -98,7 +98,7 @@ static bool updateIdx(cv::Mat* mat, std::vector<int>& indices, size_t inc) {
 - (instancetype)initWithSize:(Size2i*)size type:(int)type {
     self = [super init];
     if (self) {
-        _nativePtr = new cv::Mat(size.width, size.height, type);
+        _nativePtr = new cv::Mat(size.height, size.width, type);
     }
     return self;
 }
@@ -128,7 +128,7 @@ static bool updateIdx(cv::Mat* mat, std::vector<int>& indices, size_t inc) {
     self = [super init];
     if (self) {
         cv::Scalar scalerTemp(scalar.val[0].doubleValue, scalar.val[1].doubleValue, scalar.val[2].doubleValue, scalar.val[3].doubleValue);
-        _nativePtr = new cv::Mat(size.width, size.height, type, scalerTemp);
+        _nativePtr = new cv::Mat(size.height, size.width, type, scalerTemp);
     }
     return self;
 }

modules/core/misc/objc/test/MatTest.swift

@@ -17,6 +17,12 @@ class MatTests: OpenCVTestCase {
         super.tearDown()
     }
 
+    func testInitWithSize() {
+        let size = Size(width: 7, height: 9)
+        let mat = Mat(size: size, type: CvType.CV_8U)
+        assertSizeEquals(size, mat.size())
+    }
+
     func testAdjustROI() throws {
         let roi = gray0.submat(rowStart: 3, rowEnd: 5, colStart: 7, colEnd: 10)
         let originalroi = roi.clone()