Fix the cactive statistic.
Fix the cactive statistic.

Fix the cactive statistic to decrease (rather than increase) when active
memory decreases.  This regression was introduced by
aa5113b1fdafd1129c22512837c6c3d66c295fc8 (Refactor overly large/complex
functions) and first released in 3.5.0.

garoose/jemalloc,flyfeifan/jemalloc,8l/jemalloc,8l/jemalloc,wqfish/jemalloc,wfxiang08/jemalloc,VRToxin/android_external_jemalloc,CMRemix/android_external_jemalloc,TeamExodus/external_jemalloc,Dmitry-Me/jemalloc,flyfeifan/jemalloc,glandium/jemalloc,kmiku7/jemalloc,lilothar/jemalloc,flyfeifan/jemalloc,geekboxzone/mmallow_external_jemalloc,wqfish/jemalloc,kmiku7/jemalloc,wqfish/jemalloc,TeamExodus/external_jemalloc,glandium/jemalloc,TeamExodus/external_jemalloc,CMRemix/android_external_jemalloc,wqfish/jemalloc,Snaipe/jemalloc,8l/jemalloc,ahmetmircik/jemalloc,leebaok/jemalloc-4.2.1-readcode,tempbottle/jemalloc,TeamExodus/external_jemalloc,kmiku7/jemalloc,lilothar/jemalloc,AndroidExternal/jemalloc,garoose/jemalloc,ahmetmircik/jemalloc,Snaipe/jemalloc,glandium/jemalloc,yy-nm/jemalloc,garoose/jemalloc,AndroidExternal/jemalloc,Dmitry-Me/jemalloc,wqfish/jemalloc,VRToxin/android_external_jemalloc,Dmitry-Me/jemalloc,Dmitry-Me/jemalloc,shekkbuilder/jemalloc,jemalloc/jemalloc-cmake,shekkbuilder/jemalloc,ahmetmircik/jemalloc,yy-nm/jemalloc,lvfeng1130/jemalloc,tempbottle/jemalloc,lvfeng1130/jemalloc,cpeterso/jemalloc,awreece/jemalloc,garoose/jemalloc,lilothar/jemalloc,wespelee/jemalloc,wespelee/jemalloc,wfxiang08/jemalloc,awreece/jemalloc,lvfeng1130/jemalloc,cpeterso/jemalloc,leebaok/jemalloc-4.2.1-readcode,Snaipe/jemalloc,CMRemix/android_external_jemalloc,VRToxin/android_external_jemalloc,flyfeifan/jemalloc,kmiku7/jemalloc,vashstorm/jemalloc,jemalloc/jemalloc-cmake,dxq-git/jemalloc,wespelee/jemalloc,dxq-git/jemalloc,AndroidExternal/jemalloc,CMRemix/android_external_jemalloc,8l/jemalloc,wfxiang08/jemalloc,leebaok/jemalloc-4.2.1-readcode,ahmetmircik/jemalloc,jemalloc/jemalloc-cmake,tempbottle/jemalloc,wfxiang08/jemalloc,awreece/jemalloc,yy-nm/jemalloc,dxq-git/jemalloc,glandium/jemalloc,shekkbuilder/jemalloc,shekkbuilder/jemalloc,cpeterso/jemalloc,vashstorm/jemalloc,leebaok/jemalloc-4.2.1-readcode,lilothar/jemalloc,VRToxin/android_external_jemalloc,awreece/jemalloc,Snaipe/jemalloc,vashstorm/jemalloc,vashstorm/jemalloc,yy-nm/jemalloc,AndroidExternal/jemalloc,geekboxzone/mmallow_external_jemalloc,geekboxzone/mmallow_external_jemalloc,cpeterso/jemalloc,tempbottle/jemalloc,dxq-git/jemalloc,geekboxzone/mmallow_external_jemalloc,lvfeng1130/jemalloc,wespelee/jemalloc,jemalloc/jemalloc-cmake