'**SUMMARY**
This is the x coordinate of the centroid for the minimum bounding rectangle
**RETURNS**
An integer that is the x position of the centrod of the minimum bounding rectangle.
**EXAMPLE**
>>> img = Image("lenna")
>>> blobs = img.findBlobs()
>>> print blobs[-1].minRectX()'

def minRectX(self):

    return self.mMinRectangle[0][0]
