Fix mismatch between new[] and delete. (Bug 376075) r+sr=bzbarsky

layout/style/nsCSSProps.cpp

@@ -303,7 +303,7 @@ nsCSSProps::ReleaseTable(void)
     delete gFontDescTable;
     gFontDescTable = nsnull;
 
-    delete gShorthandsContainingPool;
+    delete [] gShorthandsContainingPool;
     gShorthandsContainingPool = nsnull;
   }
 }