Fix str-slice with negative end-at for real

xzyfer · xzyfer · commit 8f60a962038c · 2016-12-15T23:38:17.000+11:00
Fixes #2240 (for reals) Spec sass/sass-spec#1005
diff --git a/src/functions.cpp b/src/functions.cpp
@@ -1021,7 +1021,7 @@ namespace Sass {
 
         size_t size = utf8::distance(str.begin(), str.end());
 
-        if (end_at <= size * -1.0 && size > 1) {
+        if (end_at < size * -1.0 && size > 1) {
           end_at = 0;
         }
         if (end_at < 0) {

Original file line number	Diff line number	Diff line change
`@@ -1021,7 +1021,7 @@ namespace Sass {`
`1021`	`1021`
`1022`	`1022`	`size_t size = utf8::distance(str.begin(), str.end());`
`1023`	`1023`
`1024`		`- if (end_at <= size * -1.0 && size > 1) {`
	`1024`	`+ if (end_at < size * -1.0 && size > 1) {`
`1025`	`1025`	`end_at = 0;`
`1026`	`1026`	`}`
`1027`	`1027`	`if (end_at < 0) {`