When copying a context object, allocate new memory for fMatch and fOffsets only if the size of the data being copied is different, so that a user-provided fMatch object can be properly filled (XERCESC-1870)
When copying a context object, allocate new memory for fMatch and fOffsets only if the size of the data being copied is different, so that a user-provided fMatch object can be properly filled (XERCESC-1870)

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