apt/shared_font: don't relocate zero offset

src/core/hle/service/apt/bcfnt/bcfnt.cpp

@@ -78,6 +78,7 @@ void RelocateSharedFont(Kernel::SharedPtr<Kernel::SharedMemory> shared_font, VAd
             memcpy(&cmap, data, sizeof(cmap));
 
             // Relocate the offsets in the CMAP section
+            if (cmap.next_cmap_offset != 0)
                 cmap.next_cmap_offset += offset;
 
             memcpy(data, &cmap, sizeof(cmap));
@@ -86,6 +87,7 @@ void RelocateSharedFont(Kernel::SharedPtr<Kernel::SharedMemory> shared_font, VAd
             memcpy(&cwdh, data, sizeof(cwdh));
 
             // Relocate the offsets in the CWDH section
+            if (cwdh.next_cwdh_offset != 0)
                 cwdh.next_cwdh_offset += offset;
 
             memcpy(data, &cwdh, sizeof(cwdh));