Ensure that we don't use the same typed array for both `coords` and `colors` in Mesh `figures` (issue 6287)

This regressed in 1e8d70af98.

src/core/pattern.js

@@ -345,13 +345,10 @@ Shadings.Mesh = (function MeshClosure() {
 
       reader.align();
     }
-
-    var psPacked = new Int32Array(ps);
-
     mesh.figures.push({
       type: 'triangles',
-      coords: psPacked,
-      colors: psPacked
+      coords: new Int32Array(ps),
+      colors: new Int32Array(ps),
     });
   }
 
@@ -366,13 +363,10 @@ Shadings.Mesh = (function MeshClosure() {
       coords.push(coord);
       colors.push(color);
     }
-
-    var psPacked = new Int32Array(ps);
-
     mesh.figures.push({
       type: 'lattice',
-      coords: psPacked,
-      colors: psPacked,
+      coords: new Int32Array(ps),
+      colors: new Int32Array(ps),
       verticesPerRow: verticesPerRow
     });
   }

test/pdfs/.gitignore

@@ -22,6 +22,7 @@
 !simpletype3font.pdf
 !sizes.pdf
 !close-path-bug.pdf
+!issue2948.pdf
 !issue4630.pdf
 !issue4909.pdf
 !issue5202.pdf

test/test_manifest.json

@@ -634,6 +634,13 @@
        "rounds": 1,
        "type": "eq"
     },
+    {  "id": "issue2948",
+       "file": "pdfs/issue2948.pdf",
+       "md5": "26210bed6a57d5466042aff22f0249f0",
+       "link": false,
+       "rounds": 1,
+       "type": "eq"
+    },
     {  "id": "usmanm-bad-auto-fetch",
        "file": "pdfs/usmanm-bad.pdf",
        "md5": "38afb822433aaf07fc8f54807cd4f61a",