reverting the changes, now we know it's fixed in 5.4.44, so we recognice it's fixed in latest 5.4.45 too and can remove our fix:

pecl config-show|grep /5.6|cut -c 32-|sed "s/5\.6\.[0-9]*/5.4.45/g"|xargs -t -L 1 pecl config-set

.travis.yml

@@ -1,6 +1,6 @@
 language: php
 php:
-  - 5.4.44
+  - 5.4
   - 5.5
   - 5.6
   - 7
@@ -28,7 +28,7 @@ before_script:
   - sudo apt-get update -qq
   - sudo apt-get install -y myrepos libpcre3-dev
   - case $(phpenv version-name) in
-    "5.4"|"5.4.44")
+    "5.4")
        php -m;
        pecl config-show;
        pecl config-show|grep /5.6|cut -c 32-|sed "s/5\.6\.[0-9]*/5.4.45/g"|xargs -t -L 1 pecl config-set;