fix: this fixes two small bugs for the Evaluate-statement:

- removed spurious warning about missing numerical implementation for functions that do not evaluate numerically after the Evaluate statement,
- rational coefficients multiplied by symbols that remain unevaluated were incorrectly converted to floating-point coefficients.

sources/evaluate.c

@@ -392,9 +392,9 @@ int EvaluateFun(PHEAD WORD *term, WORD level, WORD *pars)
 							mpfr_pow_si(auxr3,auxr3,ti[1],RND);
 						mpfr_mul(auxr2,auxr2,auxr3,RND);
 						ti[1] = 0;
+						first = 0;
 					}
 				}
-				first = 0;
 				goto nextfun;
 			}
 			if ( tt != tnext && *t != AGMFUNCTION && *t != ATAN2FUNCTION) goto nextfun;
@@ -677,12 +677,8 @@ int EvaluateFun(PHEAD WORD *term, WORD level, WORD *pars)
 				case MZV:
 				case EULER:
 				case MZVHALF:
-					goto nextfun;
 				default:
-					MLOCK(ErrorMessageLock);
-					MesPrint("Function in evaluate statement not yet implemented.");
-					MUNLOCK(ErrorMessageLock);
-					break;
+					goto nextfun;
 			}
 		}
 		else goto nextfun;