--- a/th_ioctx_mem.c	Mon Mar 09 16:22:01 2020 +0200
+++ b/th_ioctx_mem.c	Mon Mar 09 17:59:06 2020 +0200
@@ -12,15 +12,18 @@
 {
     size_t grow;
 
+    // Check against max size
     if (ctx->maxSize > 0 && newSize > ctx->maxSize)
     {
         ctx->status = THERR_BOUNDS;
         return FALSE;
     }
 
+    // New size is smaller than old
     if (newSize < ctx->memAlloc)
-        return TRUE;
+        goto out;
 
+    // Compute the allocation grow amount
     grow = (ctx->minAlloc > 0) ? ctx->minAlloc : 8 * 1024;
     if (newSize - ctx->memAlloc > grow)
         grow += newSize - ctx->memAlloc;
@@ -31,6 +34,7 @@
         return FALSE;
     }
 
+    // Grow the buffer
     ctx->memAlloc += grow;
     if ((ctx->memData = th_realloc(ctx->memData, ctx->memAlloc)) == NULL)
     {
@@ -38,6 +42,7 @@
         return FALSE;
     }
 
+out:
     ctx->memSize = newSize;
 
     return TRUE;