collect2.c (ignore_library): Avoid premature post-increment and null deference.

gcc/
	* collect2.c (ignore_library): Avoid premature post-increment
	and null deference.

From-SVN: r148095

gcc/ChangeLog

 2009-06-02  Richard Sandiford  <r.sandiford@uk.ibm.com>
 
+	* collect2.c (ignore_library): Avoid premature post-increment
+	and null deference.
+
+2009-06-02  Richard Sandiford  <r.sandiford@uk.ibm.com>
+
 	* Makefile.in (libgcc.mvars): Add TARGET_SYSTEM_ROOT.
 	* config/rs6000/aix.h (LINK_SYSCALLS_SPEC): Add %R to the
 	!CROSS_DIRECTORY_STRUCTURE alternative and use it for

gcc/collect2.c

@@ -2448,9 +2448,11 @@ static int ignore_library (const char *);
 static int
 ignore_library (const char *name)
 {
-  const char *const *p = &aix_std_libs[0];
-  while (*p++ != NULL)
-    if (! strcmp (name, *p)) return 1;
+  const char *const *p;
+
+  for (p = &aix_std_libs[0]; *p != NULL; ++p)
+    if (strcmp (name, *p) == 0)
+      return 1;
   return 0;
 }
 #endif /* COLLECT_EXPORT_LIST */