reintroduced exit statement in pseudo-algorithm

Author: howcome

css-multicol/Overview.src.html

@@ -10,6 +10,7 @@
 
 <script defer=defer
       src="http://test.csswg.org/harness/annotate.js#css-multicol-1_dev"
+
       type="text/javascript"></script>
 
 <style type="text/css">
@@ -784,7 +785,7 @@ <h3>'columns'</h3>
 <h3>Pseudo-algorithm</h3>
 
 <P>The pseudo-algorithm below determines the used values for
-'column-count' (N) and 'column-width' (W). There is one other variable
+'column-count' (N) and 'column-width' (W) when . There is one other variable
 in the pseudo-algorithm: U is the used width of the multi-column
 element.
 
@@ -807,19 +808,21 @@ <h3>Pseudo-algorithm</h3>
 
 
 <pre>
-(01)  if column-width = auto then
-(02)      N := column-count
-(03)   else if column-count = auto then
-(04)      N := max(1, 
-(05)        floor((U + column-gap)/(column-width + column-gap)))
-(06)    else
-(07)      N := min(column-count, max(1, 
-(08)        floor((U + column-gap)/(column-width + column-gap))))
+(01)  if ((column-width = auto) and (column-count = auto)) then
+(02)      exit; /* not a multicol element */
+(03)  if column-width = auto then
+(04)      N := column-count
+(05)  else if column-count = auto then
+(06)      N := max(1, 
+(07)        floor((U + column-gap)/(column-width + column-gap)))
+(08)  else
+(09)      N := min(column-count, max(1, 
+(10)        floor((U + column-gap)/(column-width + column-gap))))
 </pre>
 
 <p>And:
 <pre>
-(09)  W := max(0, ((U + column-gap)/N - column-gap)
+(11)  W := max(0, ((U + column-gap)/N - column-gap)
 </pre>