Use location of control flow root for EntryNode

Author: owen-mc

go/ql/lib/semmle/go/controlflow/ControlFlowGraphImpl.qll

@@ -440,9 +440,7 @@ class EntryNode extends ControlFlow::Node, MkEntryNode {
   override predicate hasLocationInfo(
     string filepath, int startline, int startcolumn, int endline, int endcolumn
   ) {
-    root.hasLocationInfo(filepath, startline, startcolumn, _, _) and
-    endline = startline and
-    endcolumn = startcolumn
+    root.hasLocationInfo(filepath, startline, startcolumn, endline, endcolumn)
   }
 }
 

go/ql/test/extractor-tests/go1.17/CFG.expected

@@ -2,13 +2,13 @@ nodes
 edges
 | conversions.go:0:0:0:0 | entry | conversions.go:3:1:3:15 | skip |
 | conversions.go:3:1:3:15 | skip | conversions.go:5:6:5:8 | skip |
-| conversions.go:5:1:5:1 | entry | conversions.go:5:10:5:10 | argument corresponding to _ |
+| conversions.go:5:1:5:29 | entry | conversions.go:5:10:5:10 | argument corresponding to _ |
 | conversions.go:5:1:5:29 | function declaration | conversions.go:7:6:7:9 | skip |
 | conversions.go:5:6:5:8 | skip | conversions.go:5:1:5:29 | function declaration |
 | conversions.go:5:10:5:10 | argument corresponding to _ | conversions.go:5:10:5:10 | initialization of _ |
 | conversions.go:5:10:5:10 | initialization of _ | conversions.go:5:28:5:29 | skip |
 | conversions.go:5:28:5:29 | skip | conversions.go:5:29:5:29 | exit |
-| conversions.go:7:1:7:1 | entry | conversions.go:8:6:8:6 | skip |
+| conversions.go:7:1:26:1 | entry | conversions.go:8:6:8:6 | skip |
 | conversions.go:7:1:26:1 | function declaration | conversions.go:0:0:0:0 | exit |
 | conversions.go:7:6:7:9 | skip | conversions.go:7:1:26:1 | function declaration |
 | conversions.go:8:6:8:6 | assignment to a | conversions.go:10:2:10:2 | skip |