Add missing includes for std::runtime_error

src/3rdparty/squirrel/squirrel/sqcompiler.h

@@ -2,6 +2,8 @@
 #ifndef _SQCOMPILER_H_
 #define _SQCOMPILER_H_
 
+#include <stdexcept>
+
 struct SQVM;
 
 #define	TK_IDENTIFIER	258

src/widget.cpp

@@ -23,6 +23,7 @@
 #include "table/strings.h"
 #include "table/string_colours.h"
 
+#include <stdexcept>
 #include <numeric>
 
 #include "safeguards.h"