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Check return values of fread in rgblink

Signed-off-by: Antonio Niño Díaz <[email protected]>

--- a/src/link/output.c

+++ b/src/link/output.c

@@ -2,6 +2,7 @@

 #include <stdlib.h>

 #include <string.h>

+#include "extern/err.h"

 #include "link/mylink.h"

 #include "link/mapfile.h"

 #include "link/main.h"

@@ -24,7 +25,10 @@

 	if (f_overlay != NULL) {

 		fseek(f_overlay, 0L, SEEK_SET);

-		fread(mem, 1, MaxAvail[BANK_ROM0], f_overlay);

+		if (fread(mem, 1, MaxAvail[BANK_ROM0], f_overlay) !=

+		    MaxAvail[BANK_ROM0]) {

+			warnx("Failed to read data from overlay file.");

+		}

 	} else {

 		memset(mem, fillchar, MaxAvail[BANK_ROM0]);

 	}

@@ -58,7 +62,10 @@

 	if (f_overlay != NULL && bank <= MaxOverlayBank) {

 		fseek(f_overlay, bank*0x4000, SEEK_SET);

-		fread(mem, 1, MaxAvail[bank], f_overlay);

+		if (fread(mem, 1, MaxAvail[bank], f_overlay) !=

+		    MaxAvail[bank]) {

+			warnx("Failed to read data from overlay file.");

+		}

 	} else {

 		memset(mem, fillchar, MaxAvail[bank]);

 	}