Commit 2d27acf

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Merge pull request #872 from iabdalkader/wire_buffer_overflow

Wire: Fix buffer overflow in requestFrom.

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Original file line number	Diff line number	Diff line change
`@@ -93,6 +93,7 @@ uint8_t arduino::MbedI2C::endTransmission(void) {`
`93`	`93`
`94`	`94`	`size_t arduino::MbedI2C::requestFrom(uint8_t address, size_t len, bool stopBit) {`
`95`	`95`	`char buf[256];`
	`96`	`+ len = min(len, sizeof(buf));`
`96`	`97`	`int ret = master->read(address << 1, buf, len, !stopBit);`
`97`	`98`	`if (ret != 0) {`
`98`	`99`	`return 0;`

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