compiledata: Generate an error if import phoneme will override settings.

phsource/ph_bulgarian

 endphoneme
 
 phoneme x
-  voicingswitch x   // [x] doesn't switch to [Q]
   import_phoneme base/x
+  voicingswitch x   // [x] doesn't switch to [Q]
 endphoneme
 
 

phsource/ph_burmese

 endphoneme
 
 phoneme ph //aspirated
-  vls blb stop
+  //vls blb stop
   import_phoneme base/p
 endphoneme
 
 endphoneme
 
 phoneme th
-  vls alv stop
+  //vls alv stop
   import_phoneme base/t
 endphoneme
 
 endphoneme
 
 phoneme kh
-  vls vel stop
+  //vls vel stop
   import_phoneme base/k
 endphoneme
 

phsource/ph_kyrgyz

 
 phoneme ts
   ipa ts        
-  Length 10
   import_phoneme consonants/ts
 endphoneme
 

phsource/ph_lithuanian

 
 
 phoneme ts
-  Length 10
   import_phoneme consonants/ts
 endphoneme
 

phsource/ph_russian

 
 
 phoneme ts
-  Length 10
   import_phoneme consonants/ts
 endphoneme
 

src/libespeak-ng/compiledata.c

 		return;
 	}
 
+	if (phoneme_out->phflags != 0 ||
+	    phoneme_out->type != phINVALID ||
+	    phoneme_out->start_type != 0 ||
+	    phoneme_out->end_type != 0 ||
+	    phoneme_out->std_length != 0 ||
+	    phoneme_out->length_mod != 0) {
+		error("Phoneme import will override set properties.");
+	}
+
 	ph_mnem = phoneme_out->mnemonic;
 	ph_code = phoneme_out->code;
 	memcpy(phoneme_out, ph, sizeof(PHONEME_TAB));