GBA: Fix crash when new size is larger than rom size after soft-patching

src/gba/GBA.cpp

@@ -458,6 +458,23 @@ variable_desc saveGameStruct[] = {
 
 static int romSize = SIZE_ROM;
 
+void gbaUpdateRomSize(int size)
+{
+    // Only change memory block if new size is larger
+    if (size > romSize) {
+        romSize = size;
+
+        uint8_t* tmp = (uint8_t*)realloc(rom, SIZE_ROM);
+        rom = tmp;
+
+        uint16_t* temp = (uint16_t*)(rom + ((romSize + 1) & ~1));
+        for (int i = (romSize + 1) & ~1; i < SIZE_ROM; i += 2) {
+            WRITE16LE(temp, (i >> 1) & 0xFFFF);
+            temp++;
+        }
+    }
+}
+
 #ifdef PROFILING
 void cpuProfil(profile_segment* seg)
 {
@@ -1506,7 +1523,7 @@ int CPULoadRom(const char* szFile)
 
     uint16_t* temp = (uint16_t*)(rom + ((romSize + 1) & ~1));
     int i;
-    for (i = (romSize + 1) & ~1; i < romSize; i += 2) {
+    for (i = (romSize + 1) & ~1; i < SIZE_ROM; i += 2) {
         WRITE16LE(temp, (i >> 1) & 0xFFFF);
         temp++;
     }

src/gba/GBA.h

@@ -165,6 +165,9 @@ const char* GetSaveDotCodeFile();
 void SetLoadDotCodeFile(const char* szFile);
 void SetSaveDotCodeFile(const char* szFile);
 
+// Updates romSize and realloc rom pointer if needed after soft-patching
+void gbaUpdateRomSize(int size);
+
 extern struct EmulatedSystem GBASystem;
 
 #define R13_IRQ 18

src/wx/panel.cpp

@@ -223,6 +223,8 @@ void GameArea::LoadGame(const wxString& name)
             int size = 0x2000000 < rom_size ? 0x2000000 : rom_size;
             applyPatch(pfn.GetFullPath().mb_str(), &rom, &size);
             // that means we no longer really know rom_size either <sigh>
+
+            gbaUpdateRomSize(size);
         }
 
         wxFileConfig* cfg = wxGetApp().overrides;