Rewinded 'fp' before closing it

file_helpers.c

@@ -15,6 +15,7 @@ char* file_to_string(char* filename) {
 
 	fread(buffer,1,file_size,fp);
 
+	rewind(fp);
 	fclose(fp);
 
 	return buffer;
@@ -44,6 +45,7 @@ int num_of_lines(char* filename) {
 		}
 	}
 
+	rewind(fp);
 	fclose(fp);
 
 	return num_lines;