Rikard Falkeborn 1a50146745
autovarInvalidDeallocation: Fix fp with impossible value (#3604)
daca reports new false positives after db4f94fdfea6 on the form:

	void f() {
	    char *ptr = malloc(10);
	    char *empty_str = "";
	    if (ptr == NULL)
	        ptr = empty_str;
	    if (ptr != empty_str)
	        free(ptr);
	}

Add a check that the value is not impossible to avoid this.
2021-12-05 15:47:21 +01:00
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