Avoid pointless chunk_recycle() call.
Avoid pointless chunk_recycle() call.

Avoid calling chunk_recycle() for mmap()ed chunks if config_munmap is
disabled, in which case there are never any recyclable chunks.

This resolves #164.

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