gl_resource_manager: Fix bug when allocating 3D textures

src/video_core/renderer_opengl/gl_resource_manager.cpp

@@ -90,12 +90,13 @@ void OGLTexture::Allocate(GLenum target, GLsizei levels, GLenum internalformat,
             for (GLsizei level{0}; level < levels; ++level) {
                 glTexImage3D(target, level, internalformat, width, height, depth, 0, format, type,
                              nullptr);
-            }
+
                 width >>= 1;
                 height >>= 1;
                 if (target == GL_TEXTURE_3D)
                     depth >>= 1;
             }
+        }
         break;
     }