Fixed pixbuf bug in gtk icons. #4025

Job	Run time
Check towncrier / Towncrier Checks	29s
Pre-commit checks / Pre-commit Checks	56s
Python Package (core) / Create Python Package	57s
Python Package (cocoa) / Create Python Package	1m 0s
Python Package (android) / Create Python Package	1m 9s
Python Package (demo) / Create Python Package	57s
Python Package (dummy) / Create Python Package	1m 4s
Python Package (gtk) / Create Python Package	1m 4s
Python Package (iOS) / Create Python Package	1m 17s
Python Package (textual) / Create Python Package	59s
Python Package (toga) / Create Python Package	1m 20s
Python Package (web) / Create Python Package	59s
Python Package (winforms) / Create Python Package	1m 17s
core (macos, 3.8)	1m 12s
core (macos, 3.9)	1m 27s
core (macos, 3.10)	1m 1s
core (macos, 3.11)	1m 28s
core (macos, 3.12-dev)	2m 14s
core (ubuntu, 3.8)	46s
core (ubuntu, 3.9)	58s
core (ubuntu, 3.10)	59s
core (ubuntu, 3.11)	49s
core (ubuntu, 3.12-dev)	1m 35s
core (windows, 3.8)	1m 21s
core (windows, 3.9)	1m 14s
core (windows, 3.10)	1m 26s
core (windows, 3.11)	1m 35s
core (windows, 3.12-dev)	3m 34s
Combine & check core coverage.	32s
backend (android)	44s
backend (cocoa)	56s
backend (gtk)	1m 45s
backend (iOS)	52s
backend (web)	25s
backend (winforms)	1m 33s
testbed (macOS)	2m 58s
testbed (windows)	3m 26s
testbed (linux)	4m 17s
testbed (android)	23m 53s
testbed (iOS)	6m 18s
	1h 22m 46s

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