Correct the fallback handling when an icon cannot be loaded. #5648

Job	Run time
Pre-commit checks / Pre-commit Checks	36s
Check towncrier / Towncrier Checks	31s
Python package (cocoa) / Create Python Package	50s
Python package (core) / Create Python Package	45s
Python package (android) / Create Python Package	50s
Python package (demo) / Create Python Package	47s
Python package (dummy) / Create Python Package	43s
Python package (gtk) / Create Python Package	50s
Python package (iOS) / Create Python Package	43s
Python package (textual) / Create Python Package	44s
Python package (toga) / Create Python Package	49s
Python package (web) / Create Python Package	48s
Python package (winforms) / Create Python Package	50s
Test core (macos-12, 3.8)	1m 19s
Test core (macos-12, 3.12)	1m 46s
Test core (macos-12, 3.13-dev)	3m 47s
Test core (macos-14, 3.12)	55s
Test core (macos-14, 3.13-dev)	1m 41s
Test core (ubuntu-latest, 3.8)	54s
Test core (ubuntu-latest, 3.12)	1m 1s
Test core (ubuntu-latest, 3.13-dev)	1m 44s
Test core (windows-latest, 3.8)	1m 55s
Test core (windows-latest, 3.12)	2m 1s
Test core (ubuntu-latest, 3.9, false)	1m 0s
Test core (ubuntu-latest, 3.10, false)	56s
Test core (ubuntu-latest, 3.11, false)	51s
Coverage	54s
Testbed (macOS-x86_64)	5m 4s
Testbed (macOS-arm64)	3m 16s
Testbed (windows)	5m 2s
Testbed (linux)	3m 16s
Testbed (android)	7m 27s
Testbed (iOS)	5m 18s
	59m 53s

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