# Detect instances of "if (p) free (p);".
# Likewise for "if (p != NULL) free (p);". And with braces.
# Also detect "if (NULL != p) free (p);".
# Detect instances of "if (p) free (p);".
# Likewise for "if (p != NULL) free (p);". And with braces.
# Also detect "if (NULL != p) free (p);".