Fixed compiler warnings

Fixed error in test that caused following tests to fail

extra/yassl/taocrypt/src/dsa.cpp:
  Fixed compiler warning by adding cast
mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test:
  We have to first test for have_debug_sync to not start master wrongly
plugin/auth_pam/auth_pam.c:
  Fixed compiler warning
sql/sys_vars.h:
  Fixed compiler warning (Sys_var_max_user_conn is now signed)
support-files/compiler_warnings.supp:
  Don't give warnings for auth_pam.c (Tried to fix it by changing the code, but could not find an easy way to do that on solaris)

extra/yassl/taocrypt/src/dsa.cpp

@@ -184,7 +184,7 @@ word32 DSA_Signer::Sign(const byte* sha_digest, byte* sig,
     s_ = (kInv * (H + x*r_)) % q;
 
     if (!(!!r_ && !!s_))
-        return -1;
+      return (word32) -1;
 
     int rSz = r_.ByteCount();
 

mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test

-source include/master-slave.inc;
 source include/have_debug_sync.inc;
+source include/master-slave.inc;
 
 --echo # connection: slave
 connection slave;

plugin/auth_pam/auth_pam.c

@@ -107,7 +107,7 @@ static int conv(int n, const struct pam_message **msg,
 
 #define DO(X) if ((status = (X)) != PAM_SUCCESS) goto end
 
-#ifdef SOLARIS
+#if defined(SOLARIS) || defined(__sun)
 typedef void** pam_get_item_3_arg;
 #else
 typedef const void** pam_get_item_3_arg;

sql/sys_vars.h

@@ -959,7 +959,7 @@ class Sys_var_max_user_conn: public Sys_var_int
   Sys_var_max_user_conn(const char *name_arg,
           const char *comment, int flag_args, ptrdiff_t off, size_t size,
           CMD_LINE getopt,
-          uint min_val, uint max_val, uint def_val,
+          int min_val, int max_val, int def_val,
           uint block_size, PolyLock *lock=0,
           enum binlog_status_enum binlog_status_arg=VARIABLE_NOT_IN_BINLOG,
           on_check_function on_check_func=0,

support-files/compiler_warnings.supp

@@ -163,6 +163,7 @@ mySTL/algorithm\.hpp: is used uninitialized in this function
 #
 .*/my_config\.h : _FILE_OFFSET_BITS
 /usr/include/sys/feature_tests.h : this is the location of the previous definition
+*auth_pam\.c : initialization from incompatible pointer type : 100-200
 
 #
 # Unexplanable (?) stuff