Memory allocation fixes in flatlaf-natives/flatlaf-natives-windows

[johnplatts]

I noticed that the operator delete[] overload is missing (and should be added) to the flatlaf-natives/flatlaf-natives-windows/src/main/cpp/Runtime.cpp file as follows:

 void __cdecl operator delete[]( void* pv, size_t cb ) { 
 	if( pv != NULL ) 
 		::HeapFree( ::GetProcessHeap(), 0, pv ); 
 } 

The following line in flatlaf-natives/flatlaf-natives-windows/src/main/cpp/HWNDMap.cpp needs to be changed to delete[] table:

FlatLaf/flatlaf-natives/flatlaf-natives-windows/src/main/cpp/HWNDMap.cpp

Line 137 in 596ff33

delete table;

There is also undefined behavior in FlatWndProc::install, HWNDMap::HWNDMap, and HWNDMap::ensureCapacity if memory allocation fails.

[johnplatts]

I have created a branch at https://github.com/johnplatts/FlatLaf_Win32_Native_Fix/tree/flatlaf_win32_native_fix that includes fixes to flatlaf-natives/flatlaf-natives-windows/src/main/cpp/ to fix the issues surrounding memory allocation failures and overflow in HWNDMap::ensureCapacity.

[DevCharly]

@johnplatts Thanks. I'll have a look at this in the next weeks.

[DevCharly]

@johnplatts thanks for the code.
I've changed it a little bit 😉
Sorry, but didn't like the extra methods in AllocRoutines.h. So, removed it.

I've also removed the integer overflow handling in HWNDMap because this will never occur.
The map is designed for a small amount of entries. (uses sorted table)
It is used only for shown Swing windows/frames/dialogs.
Usually there is only one main window and some temporary dialogs.
But there will be never 2147483647 windows. 😉