Fixed issues#241 and yui#248

Author: dracony

src/com/yahoo/platform/yui/compressor/CssCompressor.java

@@ -226,7 +226,7 @@ public void compress(Writer out, int linebreakpos)
         // But, be careful not to turn "p :link {...}" into "p:link{...}"
         // Swap out any pseudo-class colons with the token, and then swap back.
         sb = new StringBuffer();
-        p = Pattern.compile("(^|\\})(([^\\{:])+:)+([^\\{]*\\{)");
+        p = Pattern.compile("(^|\\})((^|([^\\{:])+):)+([^\\{]*\\{)");
         m = p.matcher(css);
         while (m.find()) {
             String s = m.group();
@@ -336,7 +336,7 @@ public void compress(Writer out, int linebreakpos)
         // Replace 0 0 0 0; with 0.
         css = css.replaceAll(":0 0 0 0(;|})", ":0$1");
         css = css.replaceAll(":0 0 0(;|})", ":0$1");
-        css = css.replaceAll(":0 0(;|})", ":0$1");
+        css = css.replaceAll("(?<!flex):0 0(;|})", ":0$1");
 
 
         // Replace background-position:0; with background-position:0 0;

tests/bug-flex.css

@@ -0,0 +1,3 @@
+.flex-text{
+    flex:0 0;
+}

tests/bug-flex.css.min

@@ -0,0 +1 @@
+.flex-text{flex:0 0}

tests/bug-nested-pseudoclass.css

@@ -0,0 +1,3 @@
+:first-child  :last-child{
+    background-color:red
+}

tests/bug-nested-pseudoclass.css.min

@@ -0,0 +1 @@
+:first-child :last-child{background-color:red}