make the caller of getRowHeight function adapt row number change, update comment: use rows number instead of rows index.

Author: xuri

col.go

@@ -592,9 +592,9 @@ func (f *File) positionObjectPixels(sheet string, col, row, x1, y1, width, heigh
 	}
 
 	// Subtract the underlying cell heights to find end cell of the object.
-	for height >= f.getRowHeight(sheet, rowEnd) {
-		height -= f.getRowHeight(sheet, rowEnd)
+	for height >= f.getRowHeight(sheet, rowEnd+1) {
 		rowEnd++
+		height -= f.getRowHeight(sheet, rowEnd)
 	}
 
 	// The end vertices are whatever is left from the width and height.

picture.go

@@ -618,10 +618,10 @@ func (f *File) drawingResize(sheet string, cell string, width, height float64, f
 	if inMergeCell {
 		cellWidth, cellHeight = 0, 0
 		c, r = rng[0], rng[1]
-		for col := rng[0] - 1; col < rng[2]; col++ {
+		for col := rng[0]; col <= rng[2]; col++ {
 			cellWidth += f.getColWidth(sheet, col)
 		}
-		for row := rng[1] - 1; row < rng[3]; row++ {
+		for row := rng[1]; row <= rng[3]; row++ {
 			cellHeight += f.getRowHeight(sheet, row)
 		}
 	}

rows.go

@@ -266,7 +266,7 @@ func (f *File) SetRowHeight(sheet string, row int, height float64) error {
 }
 
 // getRowHeight provides a function to get row height in pixels by given sheet
-// name and row index.
+// name and row number.
 func (f *File) getRowHeight(sheet string, row int) int {
 	ws, _ := f.workSheetReader(sheet)
 	for i := range ws.SheetData.Row {
@@ -280,7 +280,7 @@ func (f *File) getRowHeight(sheet string, row int) int {
 }
 
 // GetRowHeight provides a function to get row height by given worksheet name
-// and row index. For example, get the height of the first row in Sheet1:
+// and row number. For example, get the height of the first row in Sheet1:
 //
 //    height, err := f.GetRowHeight("Sheet1", 1)
 //