membuffer: errno style error reporting

src/util-buffer.c

@@ -31,9 +31,13 @@
 
 MemBuffer *MemBufferCreateNew(uint32_t size)
 {
+    sc_errno = SC_OK;
     if (size > MAX_LIMIT) {
-        SCLogWarning(SC_ERR_MEM_BUFFER_API, "Mem buffer asked to create "
-                     "buffer with size greater than API limit - %d", MAX_LIMIT);
+        SCLogWarning(SC_EINVAL,
+                "Mem buffer asked to create "
+                "buffer with size greater than API limit - %d",
+                MAX_LIMIT);
+        sc_errno = SC_EINVAL;
         return NULL;
     }
 
@@ -41,6 +45,7 @@ MemBuffer *MemBufferCreateNew(uint32_t size)
 
     MemBuffer *buffer = SCMalloc(total_size);
     if (unlikely(buffer == NULL)) {
+        sc_errno = SC_ENOMEM;
         return NULL;
     }
     memset(buffer, 0, total_size);