fix(esp32): Compiler warning - loop variable a shadows previous instance of a in function i2c_slave_gpio_mode

[martinbudden]

In function i2c_slave_gpio_mode an inner loop variable a shadows an outer loop variable a.

This causes the warning:
warning: declaration of 'a' shadows a previous local [-Wshadow]
when compiled with option-Wshadow.

Description of Change

Renamed variable a in inner loop to b.

Test Scenarios

Code compiles without warning when change made.

Related links

None

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All committers have signed the CLA.

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Warnings

⚠️

Some issues found for the commit messages in this PR: the commit message "Fix shadow warning - loop variable a shadows previous instance of a.": summary should not end with a period (full stop) summary looks empty type/action looks empty Please fix these commit messages - here are some basic tips: follow Conventional Commits style correct format of commit message should be: <type/action>(<scope/component>): <summary>, for example fix(esp32): Fixed startup timeout issue allowed types are: change,ci,docs,feat,fix,refactor,remove,revert,test sufficiently descriptive message summary should be between 10 to 72 characters and start with upper case letter avoid Jira references in commit messages (unavailable/irrelevant for our customers) TIP: Install pre-commit hooks and run this check when committing (uses the Conventional Precommit Linter).

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Memory usage test (comparing PR against master branch)

The table below shows the summary of memory usage change (decrease - increase) in bytes and percentage for each target.

Memory	FLASH [bytes]		FLASH [%]		RAM [bytes]		RAM [%]
Target	DEC	INC	DEC	INC	DEC	INC	DEC	INC
ESP32C5	0	0	0.00	0.00	0	0	0.00	0.00
ESP32P4	0	0	0.00	0.00	0	0	0.00	0.00
ESP32S3	0	0	0.00	0.00	0	0	0.00	0.00
ESP32S2	0	0	0.00	0.00	0	0	0.00	0.00
ESP32C3	0	0	0.00	0.00	0	0	0.00	0.00
ESP32C6	0	0	0.00	0.00	0	0	0.00	0.00
ESP32H2	0	0	0.00	0.00	0	0	0.00	0.00
ESP32	0	0	0.00	0.00	0	0	0.00	0.00

Click to expand the detailed deltas report [usage change in BYTES]

Target	ESP32C5		ESP32P4		ESP32S3		ESP32S2		ESP32C3		ESP32C6		ESP32H2		ESP32
Example	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM
libraries/ESP32/examples/CI/CIBoardsTest	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
libraries/ESP_I2S/examples/ES8388_loopback	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
libraries/HTTPClient/examples/HTTPClientEnterprise	0	0	-	-	0	0	0	0	0	0	0	0	-	-	0	0
libraries/NetworkClientSecure/examples/WiFiClientSecureEnterprise	0	0	-	-	0	0	0	0	0	0	0	0	-	-	0	0
libraries/Wire/examples/WireMaster	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
libraries/Wire/examples/WireScan	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
libraries/Wire/examples/WireSlave	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
libraries/Wire/examples/WireSlaveFunctionalCallback	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

[github-actions]

Test Results

0 tests   0 ✅  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit 02469d4.

♻️ This comment has been updated with latest results.