crn_rgba: use “algorithm” header to avoid std::min/max being unknown

avoid this error on some systems (Clang on macOS or FreeBSD):

netradiant/libs/crnrgba/crn_rgba.cpp:93:38: error: no
      member named 'max' in namespace 'std'
    const crn_uint32 blocks_x = std::max(1U, (ti.m_width + 3) >> 2);

diff --git a/libs/crnrgba/crn_rgba.cpp b/libs/crnrgba/crn_rgba.cpp
index 8dec126fe1423734ebd7a59ac2653624ee4a7bbf..012b95fb822121e96784ad18e4929c01003d699a 100644 (file)
--- a/libs/crnrgba/crn_rgba.cpp
+++ b/libs/crnrgba/crn_rgba.cpp
@@ -25,7 +25,7 @@
 #include <string.h>
 
 #include <memory>
-
+#include <algorithm>
 
 #include "ddslib.h"
 #include "../crunch/inc/crn_decomp.h"