stb: ++safety.

make it safe not to leave potential dangling pointers.

diff --git a/src/vector/stb/stb_image.h b/src/vector/stb/stb_image.h
index b8ab0553749ed644847940cc7a2582610f3cad91..b27f26e3a3984b91d54a7449943ee84ee4d5edd1 100644 (file)
--- a/src/vector/stb/stb_image.h
+++ b/src/vector/stb/stb_image.h
@@ -580,7 +580,8 @@ typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1];
 #ifndef STBI_MALLOC
 #define STBI_MALLOC(sz)           malloc(sz)
 #define STBI_REALLOC(p,newsz)     realloc(p,newsz)
-#define STBI_FREE(p)              free(p)
+#define STBI_FREE(p)              free(p); \
+                                  p = NULL
 #endif
 
 #ifndef STBI_REALLOC_SIZED