x86: mkpiggy.c: Explicitly close the output file

Even though the resource is released when the application is closed or
when returned from main function, modify the code to make it obvious,
and to keep static analysis tools from complaining.

Signed-off-by: Geyslan G. Bem <geyslan@gmail.com>
Link: http://lkml.kernel.org/r/1381184219-10985-1-git-send-email-geyslan@gmail.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

arch/x86/boot/compressed/mkpiggy.c

@@ -36,11 +36,12 @@ int main(int argc, char *argv[])
 	uint32_t olen;
 	long ilen;
 	unsigned long offs;
-	FILE *f;
+	FILE *f = NULL;
+	int retval = 1;
 
 	if (argc < 2) {
 		fprintf(stderr, "Usage: %s compressed_file\n", argv[0]);
-		return 1;
+		goto bail;
 	}
 
 	/* Get the information for the compressed kernel image first */
@@ -48,7 +49,7 @@ int main(int argc, char *argv[])
 	f = fopen(argv[1], "r");
 	if (!f) {
 		perror(argv[1]);
-		return 1;
+		goto bail;
 	}
 
 
@@ -58,12 +59,11 @@ int main(int argc, char *argv[])
 
 	if (fread(&olen, sizeof(olen), 1, f) != 1) {
 		perror(argv[1]);
-		return 1;
+		goto bail;
 	}
 
 	ilen = ftell(f);
 	olen = get_unaligned_le32(&olen);
-	fclose(f);
 
 	/*
 	 * Now we have the input (compressed) and output (uncompressed)
@@ -91,5 +91,9 @@ int main(int argc, char *argv[])
 	printf(".incbin \"%s\"\n", argv[1]);
 	printf("input_data_end:\n");
 
-	return 0;
+	retval = 0;
+bail:
+	if (f)
+		fclose(f);
+	return retval;
 }