recompiler: the image-edge fallthrough hole is at the BLOCK level, not the function tail

3b69868 patched the two function-tail sites, but the truncated tail is
emitted by the block-level fallthrough branch: a block with exit type
None and no successor whose next PC is not a known function emitted the
interrupt check and nothing else — execution fell off the C function
with pc==0 (verified: the re-baked overlays_static.c still carried the
truncated block_800D7FC0 tail; zero image-edge transfers were emitted).
Publish the continuation there too. The function-tail guards stay as
belt-and-braces.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

recompiler/src/code_generator.cpp

@@ -2475,7 +2475,22 @@ std::string CodeGenerator::translate_basic_block(
                << fmt::format("func_{:08X}(cpu); return;  /* fallthrough to split piece */\n",
                               next_addr);
         } else {
+            // No successor block and no known function owns the next PC —
+            // the block runs off the region/image edge. Emitting only the
+            // interrupt check here let execution FALL OFF the C function with
+            // the entry-switch's consumed pc==0: the dispatcher returned
+            // "handled" with a null PC and the top-level trampoline read it
+            // as "program ended" (WipEout 3 static bake: the 0xD5000 region
+            // variant's truncated block_800D7FC0, continuation 0x800D8004,
+            // died the moment CD streaming loaded content matching that
+            // variant — the deterministic boot exit at ~frame 1221). Publish
+            // the continuation instead: the dispatcher routes it to whoever
+            // owns it (a neighboring region variant, AOT text, or the
+            // interpreter).
             ss << emit_interrupt_check(next_addr, config_.indent);
+            ss << config_.indent
+               << fmt::format("cpu->pc = 0x{:08X}u; return;  /* image-edge fallthrough: tail-transfer */\n",
+                              next_addr);
         }
     }