fix the return value for the provided unsetenv() for Solaris

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@13629 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/solaris-compat/compat.h

@@ -42,5 +42,5 @@ typedef unsigned int	u_int32_t;
 
 char* strsep(char** str, const char* delims);
 int setenv(const char *name, const char *value, int overwrite);
-int unsetenv(const char *name);
+void unsetenv(const char *name);
 #endif

strcompat.c

@@ -50,8 +50,8 @@ int setenv(const char *name, const char *value, int overwrite)
 	return ret;
 }
 
-int unsetenv(const char *name)
+void unsetenv(const char *name)
 {
-  setenv(name,"",0);
+	setenv(name, "", 0);
 }