null check progress DOM element even if it's configured to be on
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		@@ -176,6 +176,7 @@ You can change the appearance of the speaker notes by editing the file at `plugi
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- Added beige theme
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					- Added beige theme
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- Added 'autoSlide' config
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					- Added 'autoSlide' config
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- Bug fix: The 'slidechanged' event is now firing upon 'hashchange'. Thanks [basecode](https://github.com/basecode)
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					- Bug fix: The 'slidechanged' event is now firing upon 'hashchange'. Thanks [basecode](https://github.com/basecode)
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					- Bug fix: JS error when the 'progress' option was true but there was no progress DOM element
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#### 1.3
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					#### 1.3
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- Revised keyboard shortcuts, including ESC for overview, N for next, P for previous. Thanks [mahemoff](https://github.com/mahemoff)
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					- Revised keyboard shortcuts, including ESC for overview, N for next, P for previous. Thanks [mahemoff](https://github.com/mahemoff)
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@@ -155,7 +155,7 @@ var Reveal = (function(){
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			dom.controls.style.display = 'block';
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								dom.controls.style.display = 'block';
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		}
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							}
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		if( config.progress ) {
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							if( config.progress && dom.progress ) {
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			dom.progress.style.display = 'block';
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								dom.progress.style.display = 'block';
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		}
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							}
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@@ -680,7 +680,7 @@ var Reveal = (function(){
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		}
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							}
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		// Update progress if enabled
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							// Update progress if enabled
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		if( config.progress ) {
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							if( config.progress && dom.progress ) {
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			dom.progressbar.style.width = ( indexh / ( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ).length - 1 ) ) * window.innerWidth + 'px';
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								dom.progressbar.style.width = ( indexh / ( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ).length - 1 ) ) * window.innerWidth + 'px';
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		}
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							}
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