Fix bogus CreateDialog deprecation warning on every compile - #2543

Problem

Since the #pragma deprecated was added to IsSoundPrecached, every plugin compile emits this warning, even for an empty plugin that only does #include <sourcemod>:

halflife.inc(655) : warning 234: symbol "CreateDialog" is marked as deprecated: Doesn't work correctly, always returns true.
native bool IsSoundPrecached(const char[] sound);
   655 |         kv.SetString("title", destination);
-----------------------------^

Note the warning names CreateDialog but prints IsSoundPrecached's deprecation message — and CreateDialog returns void, so "always returns true" cannot apply to it.

Cause

The apostrophe in Doesn't is lexed as the start of a character literal, so the #pragma deprecated message swallows the following line — the entire native bool IsSoundPrecached(...) declaration (which is why it appears verbatim in the warning output). As a result:

1. IsSoundPrecached becomes an undefined symbol (calling it fails with error 017: undefined symbol "IsSoundPrecached").
2. The deprecation attaches to the next declared symbol, CreateDialog.
3. The stock DisplayAskConnectBox in the same file calls CreateDialog, and stocks are analyzed even when unused, so the warning fires on every compile of every plugin.

Minimal repro of the compiler behavior:

#pragma deprecated Doesn't work correctly
native bool FirstNative();

native void SecondNative();

stock void CallsSecond() { SecondNative(); }   // warns: SecondNative deprecated (wrong symbol)
public void OnPluginStart() {}                 // FirstNative is now an undefined symbol

Fix

Reword the message to avoid the apostrophe (Doesn't -> Does not). Verified with spcomp 1.12.0.7246:

• Empty plugin compiles with no warnings.
• IsSoundPrecached resolves again, and actual call sites get the intended warning 234 on IsSoundPrecached itself.

The underlying lexer behavior is arguably a separate sourcepawn bug, but rewording the message fixes the fallout for every SourceMod user today.

Backport

Since the warning affects everyone compiling against 1.12 includes, a backport to 1.12-dev would be appreciated.