[ObjC] fix the pddm source check.

PiperOrigin-RevId: 781117217
diff --git a/objectivec/DevTools/sources_pddm_expansion_test.sh b/objectivec/DevTools/sources_pddm_expansion_test.sh
index 99e01a1..447bd3d 100755
--- a/objectivec/DevTools/sources_pddm_expansion_test.sh
+++ b/objectivec/DevTools/sources_pddm_expansion_test.sh
@@ -1,9 +1,14 @@
 #!/bin/bash
 
-${TEST_SRCDIR}/google3/third_party/protobuf/objectivec/pddm \
+die() {
+    echo "Error: $1"
+    exit 1
+}
+
+objectivec/DevTools/pddm.py \
   --dry-run \
-  ${TEST_SRCDIR}/google3/third_party/protobuf/objectivec/*.[hm] \
-  ${TEST_SRCDIR}/google3/third_party/protobuf/objectivec/Tests/*.[hm] \
+  objectivec/*.[hm] \
+  objectivec/Tests/*.[hm] \
   || die "Update by running: objectivec/DevTools/pddm.py objectivec/*.[hm] objectivec/Tests/*.[hm]"
 
 echo "PASS"
diff --git a/objectivec/GPBCodedOutputStream.m b/objectivec/GPBCodedOutputStream.m
index 67c69a4..85ee8b3 100644
--- a/objectivec/GPBCodedOutputStream.m
+++ b/objectivec/GPBCodedOutputStream.m
@@ -829,7 +829,7 @@
   }
 }
 
-//%PDDM-EXPAND-END (19 expansions)
+//%PDDM-EXPAND-END (18 expansions)
 
 // clang-format on