Merge pull request #45 from 0Bitbiscuits/toolchain

fix a bug at ftrylockfile(patch)

Author: BernardXiong

src/internal/stdio_impl.h

@@ -19,12 +19,12 @@
 #define FLOCK(f)                                    \
     do{                                             \
         if(!f->_flock) __lock_init_recursive(f->_flock);    \
-        return __lock_take_recursive(f->_flock);           \
+        __lock_take_recursive(f->_flock);           \
     }while(0)
 #define FTRYLOCK(f)                                    \
     do{                                             \
         if(!f->_flock) __lock_init_recursive(f->_flock);    \
-        __lock_trytake_recursive(f->_flock);           \
+        return __lock_trytake_recursive(f->_flock);           \
     }while(0)
 #define FUNLOCK(f)      __lock_release_recursive(f->_flock)