fix comments

src/core/nginx.c

diff --git a/src/core/nginx.c b/src/core/nginx.c
index 5df96a4..a5fbccd 100644
--- a/src/core/nginx.c
+++ b/src/core/nginx.c
@@ -919,7 +919,7 @@
     }
 
     /*
-     * set by pcalloc()
+     * set by ngx_pcalloc()
      *
      *     ccf->pid = NULL;
      *     ccf->oldpid = NULL;

src/misc/ngx_google_perftools_module.c

diff --git a/src/misc/ngx_google_perftools_module.c b/src/misc/ngx_google_perftools_module.c
index a36220e..8be5b97 100644
--- a/src/misc/ngx_google_perftools_module.c
+++ b/src/misc/ngx_google_perftools_module.c
@@ -73,7 +73,7 @@
     }
 
     /*
-     * set by pcalloc()
+     * set by ngx_pcalloc()
      *
      *     gptcf->profiles = { 0, NULL };
      */