msvcp90: void functions should not return a value.

dlls/msvcp90/ios.c

@@ -362,7 +362,7 @@ void __thiscall ios_base_clear_reraise(ios_base *this, IOSB_iostate state, MSVCP
 DEFINE_THISCALL_WRAPPER(ios_base_clear, 8)
 void __thiscall ios_base_clear(ios_base *this, IOSB_iostate state)
 {
-    return ios_base_clear_reraise(this, state, FALSE);
+    ios_base_clear_reraise(this, state, FALSE);
 }
 
 /* ?clear@ios_base@std@@QAEXI@Z */
@@ -370,7 +370,7 @@ void __thiscall ios_base_clear(ios_base *this, IOSB_iostate state)
 DEFINE_THISCALL_WRAPPER(ios_base_clear_unsigned, 8)
 void __thiscall ios_base_clear_unsigned(ios_base *this, unsigned int state)
 {
-    return ios_base_clear_reraise(this, (IOSB_iostate)state, FALSE);
+    ios_base_clear_reraise(this, (IOSB_iostate)state, FALSE);
 }
 
 /* ?copyfmt@ios_base@std@@QAEAAV12@ABV12@@Z */

dlls/msvcp90/string.c

@@ -566,7 +566,7 @@ void __thiscall basic_string_char_tidy(basic_string_char *this,
 DEFINE_THISCALL_WRAPPER(basic_string_char_tidy_built, 8)
 void __thiscall basic_string_char_tidy_built(basic_string_char *this, MSVCP_bool built)
 {
-    return basic_string_char_tidy(this, built, 0);
+    basic_string_char_tidy(this, built, 0);
 }
 
 /* ?_Grow@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@IAE_NI_N@Z */