ImGui: Clear memory for font after creating texture

src/frontend-common/imgui_impl_dx11.cpp

@@ -314,6 +314,8 @@ static void ImGui_ImplDX11_CreateFontsTexture()
         desc.MaxLOD = 0.f;
         g_pd3dDevice->CreateSamplerState(&desc, &g_pFontSampler);
     }
+
+    io.Fonts->ClearTexData();
 }
 
 bool    ImGui_ImplDX11_CreateDeviceObjects()

src/frontend-common/imgui_impl_opengl3.cpp

@@ -298,6 +298,7 @@ bool ImGui_ImplOpenGL3_CreateFontsTexture()
 
     // Restore state
     glBindTexture(GL_TEXTURE_2D, last_texture);
+    io.Fonts->ClearTexData();
 
     return true;
 }

src/frontend-common/imgui_impl_vulkan.cpp

@@ -577,6 +577,7 @@ bool ImGui_ImplVulkan_CreateFontsTexture(VkCommandBuffer command_buffer)
 
     // Store our identifier
     io.Fonts->TexID = (ImTextureID)(intptr_t)&g_FontTexture;
+    io.Fonts->ClearTexData();
 
     return true;
 }