fix: Make sure texture multisampling framebuffer is being unbinded in all cases

#1653

lib/libimhex/source/ui/imgui_imhex_extensions.cpp

@@ -119,6 +119,11 @@ namespace ImGuiExt {
                 glGenFramebuffers(1, &framebuffer);
                 glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
 
+                // Unbind framebuffer on exit
+                ON_SCOPE_EXIT {
+                    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+                };
+
                 // Attach texture to color attachment 0
                 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D_MULTISAMPLE, texture, 0);
 
@@ -131,9 +136,6 @@ namespace ImGuiExt {
                     return texture;
                 }
 
-                // Unbind framebuffer
-                glBindFramebuffer(GL_FRAMEBUFFER, 0);
-
             #endif
 
             return texture;