added defaultCustomNULL

lib/common/zstd_internal.h

@@ -259,5 +259,6 @@ int ZSTD_isSkipFrame(ZSTD_DCtx* dctx);
 void* ZSTD_defaultAllocFunction(void* opaque, size_t size);
 void ZSTD_defaultFreeFunction(void* opaque, void* address);
 static ZSTD_customMem const defaultCustomMem = { ZSTD_defaultAllocFunction, ZSTD_defaultFreeFunction, NULL };
-
+static ZSTD_customMem const defaultCustomNULL = { NULL, NULL, NULL };
+    
 #endif   /* ZSTD_CCOMMON_H_MODULE */

lib/compress/zbuff_compress.c

@@ -100,8 +100,7 @@ struct ZBUFF_CCtx_s {
 
 ZBUFF_CCtx* ZBUFF_createCCtx(void)
 {
-    ZSTD_customMem const customMem = { NULL, NULL, NULL };
-    return ZBUFF_createCCtx_advanced(customMem);
+    return ZBUFF_createCCtx_advanced(defaultCustomNULL);
 }
 
 ZBUFF_CCtx* ZBUFF_createCCtx_advanced(ZSTD_customMem customMem)

lib/compress/zstd_compress.c

@@ -122,8 +122,7 @@ struct ZSTD_CCtx_s
 
 ZSTD_CCtx* ZSTD_createCCtx(void)
 {
-    ZSTD_customMem const customMem = { NULL, NULL, NULL };
-    return ZSTD_createCCtx_advanced(customMem);
+    return ZSTD_createCCtx_advanced(defaultCustomNULL);
 }
 
 ZSTD_CCtx* ZSTD_createCCtx_advanced(ZSTD_customMem customMem)

lib/decompress/zbuff_decompress.c

@@ -88,8 +88,7 @@ struct ZBUFF_DCtx_s {
 
 ZBUFF_DCtx* ZBUFF_createDCtx(void)
 {
-    ZSTD_customMem const customMem = { NULL, NULL, NULL };
-    return ZBUFF_createDCtx_advanced(customMem);
+    return ZBUFF_createDCtx_advanced(defaultCustomNULL);
 }
 
 ZBUFF_DCtx* ZBUFF_createDCtx_advanced(ZSTD_customMem customMem)

lib/decompress/zstd_decompress.c

@@ -172,8 +172,7 @@ ZSTD_DCtx* ZSTD_createDCtx_advanced(ZSTD_customMem customMem)
 
 ZSTD_DCtx* ZSTD_createDCtx(void)
 {
-    ZSTD_customMem const customMem = { NULL, NULL, NULL };
-    return ZSTD_createDCtx_advanced(customMem);
+    return ZSTD_createDCtx_advanced(defaultCustomNULL);
 }