code cleanup: fix -Wmisleading-indentation

src/libespeak-ng/CMakeLists.txt

     "-Wmissing-prototypes"
     "-Wint-conversion"
     "-Wimplicit"
+    "-Wmisleading-indentation"
   )
 endif()
 target_compile_definitions(espeak-ng PRIVATE "LIBESPEAK_NG_EXPORT=1")

src/libespeak-ng/synthesize.c

 		if (WcmdqFree() <= free_min)
 			return 1; // wait
 
-			PHONEME_LIST *prev;
-			PHONEME_LIST *next;
-        	PHONEME_LIST *next2;
+		PHONEME_LIST *prev;
+		PHONEME_LIST *next;
+		PHONEME_LIST *next2;
 
 		prev = &phoneme_list[ix-1];
 		next = &phoneme_list[ix+1];

src/libespeak-ng/voices.c

 
 		if (voice_data != NULL)
 			voices_list[n_voices_list++] = voice_data;
-			return 0;
 	}
 	return 0;
 }