FIX(plugins): Load correct pages for modules

This `VirtualQueryEx()` loop is called for each module in a
process. It reads pages starting at the module address but seems to
continue past into other modules and into dynamic allocations also.

This check stops enumerating pages once it encounters one that no longer
belongs to the module for which pages are being collected.

(Also this function opens two handles, this adds a clean up for the
first handle if opening the second fails.)

Fixes mumble-voip#6558

plugins/HostWindows.cpp

@@ -32,6 +32,7 @@ Modules HostWindows::modules() const {
 
 	const auto snapshotHandle = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE | TH32CS_SNAPMODULE32, m_pid);
 	if (snapshotHandle == INVALID_HANDLE_VALUE) {
+		CloseHandle(processHandle);
 		return {};
 	}
 
@@ -49,7 +50,11 @@ Modules HostWindows::modules() const {
 		MEMORY_BASIC_INFORMATION64 mbi;
 		auto address = reinterpret_cast< procptr_t >(me.modBaseAddr);
 		while (VirtualQueryEx(processHandle, reinterpret_cast< LPCVOID >(address),
-							  reinterpret_cast< PMEMORY_BASIC_INFORMATION >(&mbi), sizeof(mbi))) {
+							  reinterpret_cast< PMEMORY_BASIC_INFORMATION >(&mbi), sizeof(mbi))
+			   /* Only enumerate pages that belong to the allocation for this module.
+				* This stops if it sees a page for a different allocation, belonging
+				* to another module or dynamic memory, or gap between pages. */
+			   && (mbi.AllocationBase == reinterpret_cast< procptr_t >(me.modBaseAddr))) {
 			MemoryRegion region{};
 			region.address = address;
 			region.size    = mbi.RegionSize;