qlo10k1: use stdlib.h for malloc()/free()

Some qlo10k1 files need <stdlib.h> for malloc() and free(); it seems not
all Qt headers include them by default.

qlo10k1/src/ld10k1file.cpp

@@ -19,6 +19,7 @@
  *
  */
  
+#include <stdlib.h>
 #include "ld10k1file.h"
 
 class EMU10k1FilePrivate

qlo10k1/src/strglobal.cpp

@@ -19,6 +19,7 @@
  *
  */
  
+#include <stdlib.h>
 #include "strglobal.h"
 #include "strparam.h"
 #include "structure.h"

qlo10k1/src/strparam.cpp

@@ -19,6 +19,7 @@
  *
  */
  
+#include <stdlib.h>
 #include <lo10k1/lo10k1.h>
 
 #include "strglobal.h"