move msh_callocate to new utils file

src/system/linux/alloc.c

@@ -125,14 +125,3 @@ void msh_deallocate(void *ptr) {
     SYSCALL(brk, block);
   }
 };
-
-void *msh_callocate(SIZE_TYPE number, SIZE_TYPE size) {
-  SIZE_TYPE *new, i, s4;
-  new = msh_allocate(number * size);
-  if (new) {
-    for (i = 0; i < (number * size); i++) {
-      new[i] = 0;
-    }
-  }
-  return (new);
-}

src/util.c

@@ -0,0 +1,12 @@
+#include "util.h"
+
+void *msh_callocate(SIZE_TYPE number, SIZE_TYPE size) {
+  SIZE_TYPE *new, i, s4;
+  new = msh_allocate(number * size);
+  if (new) {
+    for (i = 0; i < (number * size); i++) {
+      new[i] = 0;
+    }
+  }
+  return (new);
+}

src/util.h

@@ -0,0 +1,8 @@
+#ifndef __MSH_UTIL_H
+#define __MSH_UTIL_H
+
+#include "system/system.h"
+
+void *msh_callocate(SIZE_TYPE number, SIZE_TYPE size);
+
+#endif