Fix Windows Compiler error C2133

MSVC doesn't support variable length arrays

Author: Finn

fakenect/fakenect.c

@@ -540,7 +540,7 @@ int freenect_init(freenect_context **ctx, freenect_usb_context *usb_ctx)
 char *var = getenv("FAKENECT_LOOP");
 if (var) {
 int len = strlen(var);
-char tmp[len + 1];
+char* tmp = malloc((len + 1) * sizeof(char));
 int i;
 for (i = 0; i < len; i++)
 tmp[i] = tolower(var[i]);
@@ -551,6 +551,7 @@ int freenect_init(freenect_context **ctx, freenect_usb_context *usb_ctx)
  strcmp(tmp, "off") == 0) {
 loop_playback = false;
 }
+free (tmp);
 }
 
 *ctx = fake_ctx;