Incorrect reading of data with empty cells when used with pyexcel.

[qria]

Summary

Reading an xlsx file with empty cell results in a misaligned reading.

Expected Behaviour

Input

Expected

> pyexcel.get_sheet(file_name="messy2.xlsx")

Sheet1:
+-----+-----+-----+
| a   | b   | c   |
+-----+-----+-----+
| 1.0 | 2.0 |     |
+-----+-----+-----+
|     | 2.0 | 3.0 |
+-----+-----+-----+
| 4.0 | 5.0 |     |
+-----+-----+-----+

Actual Result

> pyexcel.get_sheet(file_name="messy2.xlsx")

Sheet1:
+-----+-----+---+
| a   | b   | c |
+-----+-----+---+
| 1.0 | 2.0 |   |
+-----+-----+---+
| 2.0 | 3.0 |   |
+-----+-----+---+
| 4.0 | 5.0 |   |
+-----+-----+---+

Skimming the code it looks like pyexcel-xlsxr incorrectly assumes that data is already aligned.

FYI <sheetData/> part of the sheet xml looks like follows:

<row r="1">
    <c r="A1" s="1" t="s"><v>0</v></c>
    <c r="B1" s="1" t="s"><v>1</v></c>
    <c r="C1" s="1" t="s"><v>2</v></c>
</row>
<row r="2">
    <c r="A2" s="1"><v>1.0</v></c>
    <c r="B2" s="1"><v>2.0</v></c>
</row>
<row r="3">
    <c r="B3" s="1"><v>2.0</v></c>
    <c r="C3" s="2"><v>3.0</v></c>
</row>
<row r="4">
    <c r="A4" s="1"><v>4.0</v></c>
    <c r="B4" s="1"><v>5.0</v></c>
</row>