fix: address Copilot round-2 review on PR #126

Two small follow-ups:

1. src/m68000/m68kinterface.c: convert the four new // comments I
   added (m68k_done + emulation_initialized) to /* */ form per
   CLAUDE.md ("// allowed but prefer /* */ for new code").
2. src/tom/gpu.c: drop the redundant `if (branch_condition_table)`
   guard around the free + NULL pair.  free(NULL) is a no-op; the
   comment already documented the property.

Co-Authored-By: Claude Opus 4.7 <[email protected]>

Author: JoeMatt

src/m68000/m68kinterface.c

@@ -78,14 +78,14 @@ void M68KDebugResume(void)
 }
 
 
-// File-scope so m68k_done() below can reset it after freeing table68k.
+/* File-scope so m68k_done() below can reset it after freeing table68k. */
 static uint32_t emulation_initialized = 0;
 
-// Symmetric counterpart to the lazy init in m68k_pulse_reset().
-// Defers the actual free to readcpu.c::free_table68k() so the table
-// is owned end-to-end by the module that allocates it (table68k is
-// declared in readcpu.h).  Called from JaguarDone() so ASAN sees a
-// clean shutdown.
+/* Symmetric counterpart to the lazy init in m68k_pulse_reset().
+ * Defers the actual free to readcpu.c::free_table68k() so the table
+ * is owned end-to-end by the module that allocates it (table68k is
+ * declared in readcpu.h).  Called from JaguarDone() so ASAN sees a
+ * clean shutdown. */
 void m68k_done(void)
 {
 	free_table68k();

src/tom/gpu.c

@@ -645,15 +645,11 @@ void GPUInit(void)
 void GPUDone(void)
 {
    /* Release the branch-condition LUT so process-lifetime ASAN runs
-    * don't report it as a leak.  Safe to call without a matching
-    * GPUInit (free(NULL) is a no-op) and safe to re-call after a
-    * subsequent GPUInit (build_branch_condition_table early-outs on
-    * non-NULL pointer). */
-   if (branch_condition_table)
-   {
-      free(branch_condition_table);
-      branch_condition_table = NULL;
-   }
+    * don't report it as a leak.  Unconditional: free(NULL) is a
+    * no-op, and a subsequent GPUInit() re-allocates cleanly because
+    * build_branch_condition_table() early-outs on non-NULL pointer. */
+   free(branch_condition_table);
+   branch_condition_table = NULL;
 }
 
 void GPUReset(void)