[gardening] Fix temp variable intptr_t type to match offset uint32_t.

Follow-up to 52dc7979c615c00c59435f181d502fa7aa3e0302
Fixes failed build https://ci.chromium.org/ui/p/dart/builders/ci.sandbox/vm-aot-linux-debug-simarm_x64/4968/overview

TEST=ci

Change-Id: Ifea13d795638e2ba7b6a1e6d50f3e91f012945cf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/428841
Commit-Queue: Alexander Aprelev <aam@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>

https://dart.googlesource.com/sdk/+/e6784e05800509b7407061815813bd4665bded3a

DEPS

diff --git a/DEPS b/DEPS
index a1258c1..310f7b3 100644
--- a/DEPS
+++ b/DEPS
@@ -234,7 +234,7 @@
 ]
 
 deps = {
-  'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + 'd99dd6549909424e4cc4d788f10e231808cd5fb1',
+  'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + 'e6784e05800509b7407061815813bd4665bded3a',
 
   'flutter': Var('flutter_git') + '/mirrors/flutter' + '@' + '1d8078552d99d96c70376aa2c0b366ef52974afb',
 

commits.json

diff --git a/commits.json b/commits.json
index f61f7a3..0f133a7 100644
--- a/commits.json
+++ b/commits.json
@@ -1,4 +1,4 @@
 {
   "flutter":"1d8078552d99d96c70376aa2c0b366ef52974afb",
-  "flutter/engine/src/flutter/third_party/dart":"d99dd6549909424e4cc4d788f10e231808cd5fb1"
+  "flutter/engine/src/flutter/third_party/dart":"e6784e05800509b7407061815813bd4665bded3a"
 }
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