GB, GBA Savedata: Fix leaks when loading masked save (fixes #1197)

CHANGES

@@ -114,6 +114,7 @@ Bugfixes:
  - GB, GBA: Fix broken opposing button filter (fixes mgba.io/i/1191)
  - Qt: Fix jumbled background when paused
  - Qt: Fix FPS counter on Windows
+ - GB, GBA Savedata: Fix leaks when loading masked save (fixes mgba.io/i/1197)
 Misc:
  - mGUI: Add SGB border configuration option
  - mGUI: Add support for different settings types

src/gb/gb.c

@@ -249,7 +249,11 @@ void GBSramClean(struct GB* gb, uint32_t frameCount) {
 }
 
 void GBSavedataMask(struct GB* gb, struct VFile* vf, bool writeback) {
+	struct VFile* oldVf = gb->sramVf;
 	GBSramDeinit(gb);
+	if (oldVf && oldVf != gb->sramRealVf) {
+		oldVf->close(oldVf);
+	}
 	gb->sramVf = vf;
 	gb->sramMaskWriteback = writeback;
 	gb->memory.sram = vf->map(vf, gb->sramSize, MAP_READ);

src/gba/gba.c

@@ -138,6 +138,8 @@ void GBAUnloadROM(struct GBA* gba) {
 	gba->memory.rom = NULL;
 	gba->isPristine = false;
 
+	gba->memory.savedata.maskWriteback = false;
+	GBASavedataUnmask(&gba->memory.savedata);
 	GBASavedataDeinit(&gba->memory.savedata);
 	if (gba->memory.savedata.realVf) {
 		gba->memory.savedata.realVf->close(gba->memory.savedata.realVf);

src/gba/memory.c

@@ -99,13 +99,6 @@ void GBAMemoryDeinit(struct GBA* gba) {
 	if (gba->memory.rom) {
 		mappedMemoryFree(gba->memory.rom, gba->memory.romSize);
 	}
-	gba->memory.savedata.maskWriteback = false;
-	GBASavedataUnmask(&gba->memory.savedata);
-	GBASavedataDeinit(&gba->memory.savedata);
-	if (gba->memory.savedata.realVf) {
-		gba->memory.savedata.realVf->close(gba->memory.savedata.realVf);
-	}
-
 	if (gba->memory.agbPrintBuffer) {
 		mappedMemoryFree(gba->memory.agbPrintBuffer, SIZE_AGB_PRINT);
 	}

src/gba/savedata.c

@@ -88,7 +88,11 @@ void GBASavedataDeinit(struct GBASavedata* savedata) {
 
 void GBASavedataMask(struct GBASavedata* savedata, struct VFile* vf, bool writeback) {
 	enum SavedataType type = savedata->type;
+	struct VFile* oldVf = savedata->vf;
 	GBASavedataDeinit(savedata);
+	if (oldVf && oldVf != savedata->realVf) {
+		oldVf->close(oldVf);
+	}
 	savedata->vf = vf;
 	savedata->mapMode = MAP_READ;
 	savedata->maskWriteback = writeback;