stb_image: Fix free/realloc wrappers to handle being passed NULL
diff --git a/common/stb_image.patch b/common/stb_image.patch
index 37769af1..b88af848 100644
--- a/common/stb_image.patch
+++ b/common/stb_image.patch
@@ -1,6 +1,6 @@
---- common/stb/stb_image.h 2023-03-05 08:20:53.340368551 +0100
-+++ common/stb/stb_image.h 2023-03-05 08:24:38.120359642 +0100
-@@ -127,6 +127,49 @@
+--- common/stb/stb_image.h 2023-03-05 18:57:03.930649341 +0100
++++ common/stb/stb_image.h 2023-03-05 18:55:53.767318782 +0100
+@@ -127,6 +127,54 @@
#ifndef STBI_INCLUDE_STB_IMAGE_H
#define STBI_INCLUDE_STB_IMAGE_H
@@ -21,6 +21,9 @@
+
+#define STBI_FREE(x) do { \
+ void *STBI_FREE_buf = (x); \
++ if (STBI_FREE_buf == NULL) { \
++ break; \
++ } \
+ STBI_FREE_buf -= 16; \
+ size_t *STBI_FREE_alloc_size_ptr = STBI_FREE_buf; \
+ size_t STBI_FREE_alloc_size = *STBI_FREE_alloc_size_ptr; \
@@ -31,8 +34,10 @@
+ void *STBI_REALLOC_buf = (x); \
+ size_t STBI_REALLOC_alloc_size = (y); \
+ void *STBI_REALLOC_new_buf = STBI_MALLOC(STBI_REALLOC_alloc_size); \
-+ memcpy(STBI_REALLOC_new_buf, STBI_REALLOC_buf, STBI_REALLOC_alloc_size); \
-+ STBI_FREE(STBI_REALLOC_buf); \
++ if (STBI_REALLOC_buf != NULL) { \
++ memcpy(STBI_REALLOC_new_buf, STBI_REALLOC_buf, STBI_REALLOC_alloc_size); \
++ STBI_FREE(STBI_REALLOC_buf); \
++ } \
+ STBI_REALLOC_new_buf; \
+})
+
@@ -50,7 +55,7 @@
// DOCUMENTATION
//
// Limitations:
-@@ -381,7 +424,7 @@
+@@ -381,7 +429,7 @@
STBI_rgb_alpha = 4
};
@@ -59,7 +64,7 @@
typedef unsigned char stbi_uc;
typedef unsigned short stbi_us;
-@@ -584,8 +627,8 @@
+@@ -584,8 +632,8 @@
#include <stdarg.h>
#include <stddef.h> // ptrdiff_t on osx
@@ -70,7 +75,7 @@
#include <limits.h>
#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
-@@ -1574,10 +1617,12 @@
+@@ -1574,10 +1622,12 @@
STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
#endif
