Made a few tweaks to make texture uploading work properly in headless mode

Assets/Scripts/Modules/RenderModule.cs

@@ -108,6 +108,9 @@ public partial class RenderModule
     {
         Debug.Log($"Texture '{texture.name}' with dimensions {texture.width}x{texture.height}, data size = {data.Length} bytes");
 
+        if (texture.width == 0 || texture.height == 0)
+            return false;
+        
         if (texNum == 0)
         {
             // Assign a new texture number

engine/Quake/gl_texmgr.c

@@ -1023,6 +1023,8 @@ static void TexMgr_LoadImage32 (gltexture_t *glt, unsigned *data)
 		glt->height = TexMgr_Pad(glt->height);
 	}
 
+	UQ_GL_UploadTexture(glt, data);
+
 	// mipmap down
 	picmip = (glt->flags & TEXPREF_NOPICMIP) ? 0 : q_max((int)gl_picmip.value, 0);
 	mipwidth = TexMgr_SafeTextureSize (glt->width >> picmip);
@@ -1071,8 +1073,6 @@ static void TexMgr_LoadImage32 (gltexture_t *glt, unsigned *data)
 
 	// set filter modes
 	TexMgr_SetFilterModes (glt);
-
-	UQ_GL_UploadTexture(glt, data);
 }
 
 /*