Fix for vulkan_create_swapchain() not clearing flag (fixes random crashes with fast forwarding) (libretro#18295)

* improved vulkan_create_swapchain() to handle swapchain creation better and avoid crashes

* As requested by PR review, reverted back to original create_swapchain function with only minimal changes made for this bug fix on Android only

* fixed oepsie with copy paste

* fixed oepsie with copy paste

* Fixed random crash on Android when destroying old swapchain before new one is created with minimal changes to original vulkan_create_swapchain() function

* Restored all my initial changes without all the reformatting of the code (libretro#3)

* The VK_DATA_FLAG_CREATED_NEW_SWAPCHAIN should be cleared otherwise every call to this function can be handled as a new swapchain creation while it might not be the case, it fixes crashes on Android

Author: ro8inmorgan

gfx/common/vulkan_common.c

@@ -2337,7 +2337,9 @@ bool vulkan_create_swapchain(gfx_ctx_vulkan_data_t *vk,
 
    if (vk->flags & VK_DATA_FLAG_EMULATING_MAILBOX)
       vulkan_emulated_mailbox_init(&vk->mailbox, vk->context.device, vk->swapchain);
-
+   
+   /* This flag needs to be cleared otherwise elsewhere it can be perceived as if there's a new swapchain created everytime its being called */
+   vk->flags &= ~VK_DATA_FLAG_CREATED_NEW_SWAPCHAIN;
    return true;
 }