Initial commit — leak-hunt project complete

Five bugs identified and patched in retail Asheron's Call client:
- v3b: palette refcount over-increment (3-byte NOP at two sites)
- v5: RenderSurface PurgeResource no-op stub (vtable slot 2 thunk)
- v11: two dangling-pointer crash guards (NULL-check + reorder)
- v14: CEnvCell::Destroy ClipPlaneList leak (18-byte JMP to cleanup thunk)
- v22: unpacker stale-pointer SEH guard (whole-function __try/__except)

All five ship in leakfix.dll (117 KB, SHA d282f23c…) which is loaded
by acclient.exe at process start via PE import table patching by
tools/install_leakfix.py.

Controlled 15-client fleet soak: unpatched control died at 26h with
palette exhaustion; all 14 patched clients survived past that point
and reached ≥5-day uptime.

Residual ~15 MB/h growth traced to d3d9.dll's internal slab allocator
(260KB surface backing buffers retained after Release). See REPORT.md
§10 for the full investigation; conclusion is that it's unfixable from
outside d3d9.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tools/count_weenie_live.py

@@ -0,0 +1,72 @@
+"""count_weenie_live.py <pid> [<pid> ...]
+Count ACCWeenieObject + CWeenieObject vtable instances in committed-private RW
+heap regions of one or more live AC clients."""
+import ctypes, ctypes.wintypes as wt, struct, sys
+
+VTABLES = {
+    "ACCWeenieObject_pri":   0x007e4f70,
+    "ACCWeenieObject_sec":   0x007e4f58,
+    "CWeenieObject_pri":     0x007e4ed8,
+    "CWeenieObject_sec":     0x007e4ec4,
+}
+
+PROCESS_VM_READ = 0x10
+PROCESS_QUERY_INFORMATION = 0x400
+MEM_COMMIT = 0x1000
+MEM_PRIVATE = 0x20000
+
+class MBI(ctypes.Structure):
+    _fields_ = [('BaseAddress', ctypes.c_void_p),
+                ('AllocationBase', ctypes.c_void_p),
+                ('AllocationProtect', wt.DWORD),
+                ('PartitionId', wt.WORD),
+                ('RegionSize', ctypes.c_size_t),
+                ('State', wt.DWORD),
+                ('Protect', wt.DWORD),
+                ('Type', wt.DWORD)]
+
+k = ctypes.windll.kernel32
+k.OpenProcess.argtypes = [wt.DWORD, wt.BOOL, wt.DWORD]; k.OpenProcess.restype = wt.HANDLE
+k.CloseHandle.argtypes = [wt.HANDLE]; k.CloseHandle.restype = wt.BOOL
+k.ReadProcessMemory.argtypes = [wt.HANDLE, wt.LPCVOID, wt.LPVOID, ctypes.c_size_t,
+                                ctypes.POINTER(ctypes.c_size_t)]
+k.ReadProcessMemory.restype = wt.BOOL
+k.VirtualQueryEx.argtypes = [wt.HANDLE, ctypes.c_void_p, ctypes.POINTER(MBI), ctypes.c_size_t]
+k.VirtualQueryEx.restype = ctypes.c_size_t
+
+def scan(pid):
+    h = k.OpenProcess(PROCESS_VM_READ | PROCESS_QUERY_INFORMATION, False, pid)
+    if not h:
+        print(f"OpenProcess({pid}) err={ctypes.get_last_error()}"); return None
+    counts = {n: 0 for n in VTABLES}
+    vt_to_name = {vt: name for name, vt in VTABLES.items()}
+    mbi = MBI()
+    addr = 0
+    total_bytes = 0
+    while k.VirtualQueryEx(h, addr, ctypes.byref(mbi), ctypes.sizeof(mbi)):
+        pr = mbi.Protect & 0xff
+        if (mbi.State == MEM_COMMIT and mbi.Type == MEM_PRIVATE and pr in (0x04, 0x40)):
+            buf = (ctypes.c_ubyte * mbi.RegionSize)()
+            sz = ctypes.c_size_t(0)
+            if k.ReadProcessMemory(h, mbi.BaseAddress, buf, mbi.RegionSize, ctypes.byref(sz)):
+                data = bytes(buf[:sz.value])
+                total_bytes += sz.value
+                end = (len(data) // 4) * 4
+                for off in range(0, end, 4):
+                    v = struct.unpack_from("<I", data, off)[0]
+                    if v in vt_to_name:
+                        counts[vt_to_name[v]] += 1
+        addr = (mbi.BaseAddress or 0) + mbi.RegionSize
+        if addr >= 0x80000000: break
+    k.CloseHandle(h)
+    return counts, total_bytes
+
+if __name__ == "__main__":
+    print(f"{'pid':>6}  {'ACC_pri':>8} {'ACC_sec':>8} {'CW_pri':>8} {'CW_sec':>8}   priv_MB")
+    for arg in sys.argv[1:]:
+        pid = int(arg)
+        r = scan(pid)
+        if r is None: continue
+        c, b = r
+        print(f"{pid:6d}  {c['ACCWeenieObject_pri']:8d} {c['ACCWeenieObject_sec']:8d} "
+              f"{c['CWeenieObject_pri']:8d} {c['CWeenieObject_sec']:8d}   {b/1024/1024:7.1f}")