Fixed corner-case bug with axis-autoadjustment for flat datasets

git-svn-id: https://flot.googlecode.com/svn/trunk@97 1e0a6537-2640-0410-bfb7-f154510ff394

NEWS.txt

@@ -2,7 +2,9 @@ Flot 0.x
 --------
 
 Fixed two corner-case bugs when drawing filled curves (report and
-analysis by Joshua Varner).
+analysis by Joshua Varner). Fix auto-adjustment code when setting min
+to 0 for an axis where the dataset is completely flat on that axis
+(report by chovy).
 
 
 Flot 0.5

jquery.flot.js

@@ -375,14 +375,14 @@
 
             if (max - min == 0.0) {
                 // degenerate case
-                var widen;
-                if (max == 0.0)
-                    widen = 1.0;
-                else
-                    widen = 0.01;
+                var widen = max == 0 ? 1 : 0.01;
 
-                min -= widen;
-                max += widen;
+                if (axisOptions.min == null)
+                    min -= widen;
+                // alway widen max if we couldn't widen min to ensure we
+                // don't fall into min == max which doesn't work
+                if (axisOptions.max == null || axisOptions.min != null)
+                    max += widen;
             }
             else {
                 // consider autoscaling