pcu_emu/test: Initialise current_test

Currently the global current_test is not initialised, which leads to
memory access failures. In addition, the variable is signed but used
in comparisons with unsigned values.

This commit changes the type to size_t and initialises the variable
to 0.

Sponsored-by: On-Waves ehf

tests/emu/pcu_emu.cpp

@@ -35,7 +35,7 @@ extern "C" {
 #include <sys/types.h>
 #include <sys/socket.h>
 
-static int current_test;
+static size_t current_test;
 
 /* Extern data to please the underlying code */
 void *tall_pcu_ctx;
@@ -115,6 +115,8 @@ int main(int argc, char **argv)
 	vty_init(&pcu_vty_info);
 	pcu_vty_init(&gprs_log_info);
 
+	current_test = 0;
+
 	init_main_bts();
 	create_and_connect_bssgp(bts_main_data(), INADDR_LOOPBACK, 23000);