fix ft_modf

srcs/ft_modf.c

@@ -1,5 +1,7 @@
 #include "libft.h"
 
+#include <stdio.h> // tmp for printf, for float debug
+
 /**
  * Splits a double into its integer and fractional parts,
  * it returns the fractional part,
@@ -7,17 +9,17 @@
  * e.g.:
  *  -3.7 → -3.0 and -0.7 (returns -0.7)
  */
-double ft_modf(double x, double *int_part)
+double ft_modf(double x, double *store_int_part)
 {
 	// extract the integer part by casting to long long
 	long long integer = (long long)x;
-	if (int_part != NULL)
+	if (store_int_part != NULL)
 	{
-		*int_part = (double)integer;
+		*store_int_part = (double)integer;
 	}
 
 	// compute the fractional part
-	double frac_part = x - *int_part;
+	double frac_part = x - integer;
 
 	return frac_part;
 }