Fixed segfault in yaml_string_write_handler.

CMakeLists.txt

@@ -5,7 +5,7 @@
 
 set (YAML_VERSION_MAJOR 0)
 set (YAML_VERSION_MINOR 1)
-set (YAML_VERSION_PATCH 6)
+set (YAML_VERSION_PATCH 7)
 set (YAML_VERSION_STRING "${YAML_VERSION_MAJOR}.${YAML_VERSION_MINOR}.${YAML_VERSION_PATCH}")
 
 file (GLOB SRC src/*.c)

configure.ac

@@ -3,7 +3,7 @@
 # Define the package version numbers and the bug reporting link.
 m4_define([YAML_MAJOR], 0)
 m4_define([YAML_MINOR], 1)
-m4_define([YAML_PATCH], 6)
+m4_define([YAML_PATCH], 7)
 m4_define([YAML_BUGS], [http://pyyaml.org/newticket?component=libyaml])
 
 # Define the libtool version numbers; check the Autobook, Section 11.4.
@@ -19,7 +19,7 @@
 #           YAML_AGE = 0
 m4_define([YAML_RELEASE], 0)
 m4_define([YAML_CURRENT], 2)
-m4_define([YAML_REVISION], 4)
+m4_define([YAML_REVISION], 5)
 m4_define([YAML_AGE], 0)
 
 # Initialize autoconf & automake.

src/api.c

@@ -415,7 +415,7 @@
 {
     yaml_emitter_t *emitter = data;
 
-    if (emitter->output.string.size + *emitter->output.string.size_written
+    if (emitter->output.string.size - *emitter->output.string.size_written
             < size) {
         memcpy(emitter->output.string.buffer
                 + *emitter->output.string.size_written,