Silence more -Wreturn-type warnings

[Michael Catanzaro]

[677/2449] Building CXX object Source/...ources/UnifiedSource-f2e18ffc-38.cpp.o
In file included from JavaScriptCore/DerivedSources/unified-sources/UnifiedSource-f2e18ffc-38.cpp:2:
../../Source/JavaScriptCore/runtime/TemporalObject.cpp: In function ‘double JSC::roundNumberToIncrement(double, double, JSC::RoundingMode)’:
../../Source/JavaScriptCore/runtime/TemporalObject.cpp:331:1: warning: control reaches end of non-void function [-Wreturn-type]
  331 | }
      | ^
[687/2449] Building CXX object Source/...ources/UnifiedSource-f2e18ffc-37.cpp.o
In file included from JavaScriptCore/DerivedSources/unified-sources/UnifiedSource-f2e18ffc-37.cpp:6:
../../Source/JavaScriptCore/runtime/TemporalDuration.cpp: In function ‘JSC::PropertyName JSC::propertyName(JSC::VM&, unsigned int)’:
../../Source/JavaScriptCore/runtime/TemporalDuration.cpp:45:1: warning: control reaches end of non-void function [-Wreturn-type]
   45 | }
      | ^

[Michael Catanzaro]

Created attachment 437260 [details]
Patch for landing

[EWS]

Committed r281986 (241293@main): <https://commits.webkit.org/241293@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 437260 [details].

[Radar WebKit Bug Importer]

<rdar://problem/82719186>