avutil/internal: add FF_ALLOC_ARRAY_OR_GOTO & FF_ALLOCZ_ARRAY_OR_GOTO

These are similar to the existing FF_ALLOCZ_OR_GOTO & FF_ALLOC_OR_GOTO
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/internal.h

@@ -133,6 +133,24 @@
     }\
 }
 
+#define FF_ALLOC_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)\
+{\
+    p = av_malloc_array(nelem, elsize);\
+    if (p == NULL) {\
+        av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
+        goto label;\
+    }\
+}
+
+#define FF_ALLOCZ_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)\
+{\
+    p = av_mallocz_array(nelem, elsize);\
+    if (p == NULL) {\
+        av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
+        goto label;\
+    }\
+}
+
 #include "libm.h"
 
 #if defined(_MSC_VER)