Fixed size==0 bug pointed out by Rod P.

diff --git a/functions/stdlib/realloc.c b/functions/stdlib/realloc.c
index c1ba38f4d1cd2b674aa0ae5013ff0ebf54070379..c2bebd47a14079d8e91b271749e9efb48d9fc5fd 100644 (file)
--- a/functions/stdlib/realloc.c
+++ b/functions/stdlib/realloc.c
@@ -16,25 +16,28 @@
 
 void * realloc( void * ptr, size_t size )
 {
+    void * newptr = NULL;
     if ( ptr == NULL )
     {
         return malloc( size );
     }
+    if ( size > 0 )
     {
-    struct _PDCLIB_memnode_t * baseptr = (struct _PDCLIB_memnode_t *)( (char *)ptr - sizeof( struct _PDCLIB_memnode_t ) );
-    if ( baseptr->size >= size )
-    {
-        return ptr;
-    }
-    else
-    {
-        void * newptr = malloc( size );
-        memcpy( newptr, ptr, baseptr->size );
-        free( ptr );
-        return newptr;
-    }
+        struct _PDCLIB_memnode_t * baseptr = (struct _PDCLIB_memnode_t *)( (char *)ptr - sizeof( struct _PDCLIB_memnode_t ) );
+        if ( baseptr->size >= size )
+        {
+            /* Current memnode is large enough; nothing to do. */
+            return ptr;
+        }
+        else
+        {
+            /* Get larger memnode and copy over contents. */
+            newptr = malloc( size );
+            memcpy( newptr, ptr, baseptr->size );
+        }
     }
-    return NULL;
+    free( ptr );
+    return newptr;
 }
 
 #endif